"My best friend when I was twelve was inflatable."

 This is the first line in Joe Hill's short story "Pop Art". It remains one of my favorite opening lines to a story. (And the short story it starts is one of the best I have read in a long time.)

And in most cases a razor that has been used even once for shaving someone's legs is no longer sharp enough to shave someone's face. It is not only a matter of coarseness but also of the total area shaved. Most people have more surface area on their legs than on their face. It's the surprise factor that makes it annoying though. I was just trying to think of things that are a petty annoyance but not deadly to a relationship. The expectation that the man should be able to read his girlfriend/spouse's mind is probably the one I find most annoying. Yes this works both ways but I find the expectation much more common among females.

Another fun but annoying trick that is gender related is when your wife or girlfriend uses your razor on her legs and doesn't tell you until she hears you screaming as the whiskers are being pulled out of your face one at a time by the mysteriously dull blade.

As has been said before, all of these are already dark in the original traditions. Vampires seek immortality by stealing the life of others to add to their own. Some devoured the persons flesh in addition to drinking their blood. ( Read the original Dracula where he gives his wives a baby to eat so that they won't bother his guest if you want evil vampires.) The idea that they would just take a little blood which the person could then regenerate like they had given to a blood bank was a later idea. It was a persons life they were consuming not just some plasma.

Werewolves were magicians who transformed themselves so that they could kill and maim without it being traced back to them. Psychopathic serial killers trying to hide the evidence.

Elves were more amoral than immoral. They saw humans as toys to be used and discarded, providers of servants for their courts. Humans purpose was to serve the elves.

I would love to see an urban fantasy about the Norse Gods with Loki as the hero and the rest as villains. Though all the Norse Gods were harsh Loki was actually far from the worst of them. His main crime was using his intelligence instead of his "manly thews". Even Odin frequently turned to Loki for help when he needed smarts instead of muscle.

I would like to see more urban fantasy where vampires are seen as evil blood sucking dead fiends not necrophiliac love interests. (Thank you Jim. You were the first in a while. A few others seem to be following your lead.)

I would like to read more urban fantasies with adults for the main character(s). Immature (regardless of age) characters seem to be very popular right now. One of the things that impressed me most about Harry Dresden (no I'm not trying to turn this into a praise JB thread but this is the Jim Butcher website after all) is that in spite of having a sense of humor he acts like an adult most of the time. His lack of a love life because he doesn't want to endanger anyone, his pouring the ice water on Molly, etc., etc, even his respect for Michael in spite of not sharing his beliefs all are the actions of maturity. I'm not saying he's perfect or perfectly mature but he does act like an adult most of the time.