You have to remember that to the average Joe Wizard, Harry Dresden is a nightmare.

Indisputable Facts

• Harry is the son of an expelled wizard that had a death sentence with the Council and was known to hang out with monsters.
• Harry was adopted by a Warden in good standing with the Council, a war hero no less that helped bring down Kemmler, but Harry killed him with magic in unknown circumstances.
• Harry openly flaunted tradition by practicing openly.
• Harry started a war that could have been avoided, which got a lot of wizards killed.
• Harry committed genocide against a supernatural nation that was actively pursuing peace.
• Harry abandoned his duties after committing genocide, leaving his Council-sworn duty of protecting Chicago to a rogue apprentice wanted for murder.
• Harry became the Winter Knight, the murderous assassin for the evil Sidhe Court.
• Harry is a close associate and suspected lover of White Court royalty.
• Harry performed necromantic magic and was not punished.
• Harry killed with magic and was not punished.
• Harry's apprentice performed mind magic and was not punished.
• Harry worked with Nicodemus Archleon.
• Harry worked with Mab numerous times before becoming her assassin.
• Harry killed a Summer Lady.
• Harry was involved in the deaths of the WinterLady and another Summer Lady.

It's no wonder he lost the popular vote, and you don't even have to bring speculation into it.

“Family,” came the old man’s voice, a primordial growl lurking in it. “One. Of those things.”

He whirled toward the retreating boat, barely visible from the shore by now, and his staff burst into incandescent blue flame as he lifted it in his right hand, the hand that projects energy, drawing it back.

“No!” I shouted, and lurched toward him.

He spun, eyes surrounded by white, his face scarlet, his teeth bared in a snarl, snapping his staff out …

And what looked like a comet about the size of a quarter, blazing like a star, leapt from the staff, like some kind of bizarre random static spark, and plunged into my ribs and out my spine.

I tumbled down to the dock on my back, the stars suddenly unusually bright above me.

Also, Proven Guilty states this:

"There’s a sign Mac’s got hanging up at the door that reads ACCORDED NEUTRAL GROUND. It means that the place was supposed to be a no-combat zone, under the terms laid out in the Unseelie Accords, the most recent and influential set of principles agreed upon by most of the various nations of the supernatural maybe ten or twelve years ago."

IMHO, if there *was* something equivalent to the Accords before 1994, it clearly didn't include anything which gave Eb (or the WCouncil in general) any grounds against the WCourt.

My guess is that Harry didn't say he loved Susan in the basement of Bianca's mansion. She went feral, knocked him out but didn't kill him because of the poison in his blood, so she killed Justine instead.

Upon waking up, Harry got out and headed upstairs to find Susan fully turned with Bianca. He couldn't kill Susan, so he walked away rather than fighting.

I also like to think he still beat the Nightmare while unconscious, and ate his power. By not using it to destroy the mansion, is stayed within him, partially corrupting him.

I also think Bianca could have sent footage of Harry's attack at the party to the White Council, which declared him a full warlock. Since the place wasn't completely destroyed like it was in GP, security footage might have survived.

Thus Harry starts on the dark path with isolation and regret while being hunted by everyone.

My opinion on Vampires.

Their power is directly connected to how they feed, and how close they are to humans/mortality.  I believe that they feed on Spirit, which isn't the same as a persons soul.  I believe when it comes to humans they are made up of three parts.  Flesh, spirit, and soul.  The Flesh is the anchor to reality, and the spirit is the tether to the soul which is completely outside reality.  When the spirit is damaged, or weakened enough, the tether is lost, and the Soul travels on.  If the Flesh/Body is rendered dead, the Soul has no anchor to Earth, and the spirit/tether is left behind as a shade/ghost.

I believe the Vampires use the body as a vector to the spirit to feed on.

Black Court:  Most powerful.  Feed on flesh/death.  They kill a mortal whenever they feed, consuming all of the spirit.  Completely inhuman
Red Court: Second to the Black Court.  Feed on blood.  Usually not lethal but very damaging to the spirit.  Connected to humans, slightly
White Court:  Weaker than Black & Red Courts.  Feed on emotions through pleasure/fear/pain ect.  Not too invasive when feeding most of the time.  Much closer to humanity.  I will note that I believe Lord Raith, at peak power may have been approaching a level that would push him closer to the Red Court.  His kiss of death allowed him to devour an entire spirit, which I think is why he was so feared amongst his kind.
Jade Court:  Feeds on breath.  Not much is known about them.  My opinion is they are similar to the White Court in power and connection to humanity.  Slightly less human, or slightly more human.

I think the other Courts are all weaker.  The Black Court, and Red Courts really are the strongest in that their way of feeding is most damaging to both the body, and spirit, and also the most efficient.  Any other court that exists, I think, would be no stronger than the White Court, and their power level is determined by organization, reproduction, and collective cooperation.

I think that between the Black Court's personal power, and the Red & White Courts global footprint, there isn't much room for the weaker Courts.  The White's and Red's sucked up all the power, and influence, and it's unlikely they would share it.  So I think any other Court really doesn't have enough personal power, or ability to gain influence to matter much outside of maybe a small territory (like the Jade Court).

The Red Court is gone, but I think that power vacuum is being filled too quickly for the weaker courts to take advantage of it.


Other Courts feeding ideas:

Blue Court:  Feeds on sleep.  If they feed too heavily, the person dies in their sleep, and is seen as a natural death.  Some people become aware they are being fed on, and experience sleep paralysis, and the feeling someone is on top of them.  Science has explained this, but maybe not correctly .  Not terribly effective in combat because they require you to be asleep to be effective.  If you are asleep, and they find you, you're in deep trouble.  A side effect of their feeding is you wake up feeling exhausted, and making you more vulnerable to their feeding the next time you sleep.

Gray Court:  Feeds on illness.  They like to hover around hospitals, and nursing homes.  They need the person to be weakened by illness, and then use that illness as a vector to the spirit.  They prey on the weak, and suffering, making them hated by all mortals who know of them.  They need to stay low because Wizards take great joy in eliminating them, and they aren't terribly powerful, weaker than the White Court, and not very effective against healthy people.

Leanansidhe was originally fairly vampiric muse. Makes artist go crazy and feeds on their blood.

Redcap as well in the OG stories.

Ghouls could be considered somewhat vampiric.

Recent WOJ they feed on Breath.

Just that their extreme isolationist in the Yangtze Valley River. They're not sure whether this "Chin" thing is gonna work out letter alone 'China'.