I enjoy having a lot of freedom in roleplays, although they still require a general plot line of some sort. I prefer literate to advanced literate roleplaying. "Wolfspeak" is extremely off-putting.
I enjoy adventure, action, and at times science-fiction. Not into romance or drama at all.
As far as animal roleplays go, I want to say I prefer semi-realistic and realistic animal roleplays, although well-written fantasy is also fine. I enjoy roleplaying as a variety of species. I'm not really into fandom-based RP, Warrior Cats being the exception.
For human roleplays, I really enjoy historical-fiction (either realistic or with light sci-fi/horror/fantasy aspects that don't take away from the nature of the time period and setting)- anything relating to 20th century eastern European history especially. Good human roleplays are rare (on the internet as a whole, really), however, so for that reason I prefer animal RP.