Hmm... Magic users, shifters, and supernatural creatures (vampires, werewolves, ghosts that can become touchable ((I forgot the word)), demons, etc..)
I know that is a lot, but magic users really are my go to. Wizards, sorcerers, necromages, apprentices, potions masters, healers, elementalists -- you name it, I'm there. I have a weakness towards elemental powers, and so I generally lean toward those finds of powers when I can. I have played so many rps with the characters being able to control an element each. Then of course there are the endless other spells in a well-versed wizard, so I love to stretch my skills and try new things -- new ways of casting spells; limits; studies; advancements; new ways that it can be hard, or even painful.
I just started a book with a friend that is about a supernatural subculture on Earth that has finally been revealed, and I'm a demon, vampire, ghost, witch, werewolf, and a banshee, so... that's a good idea at my supernatural tastes. She's a human, cherry-blossom dragon shifter, ghost, angel, snow leopard shifter, and the head demon. That should give you an idea on HER tastes. I learn toward the darker side of things.
Shifters are always fun and interesting. I've never played a character that can morph into different humans, just animals. Am I the only one who feels like it's cheating to have the shifter change into many animals? I mean, I love it, but I get this little feeling in the back of my head that it is too easy and... TANGIBLE! That's the word I meant for the ghosts! ... Ahem. ... Anyway does anyone else feel that way?
Oh, and superheroes, but I'm scared to mention that here.