Though I haven’t joined any RPs yet I really love fantasy. Especially ones where people have made up races that aren’t too OP and are well-made. Though that isn’t to say that elves, dwarves, fae etc are boring.
Supernatural and slice of life are fun to play together or separately.
I don’t like sci-fi but I don’t dislike it. For this genre, plot is what will draw me in.
The occasional romance isn’t bad as long as it’s not forced.