In no particular order:
Kemonomimi (Animal features, ears, tails etc - Nekomimi <3)
Harem
Megane
Maid
Mizugi
Oppai
Pettanko
Schoolgirl
Shimapan
Stockings
Tanlines
Tsundere
Vanilla (Romance)
Yuri
Anal
Tentacles - They ok depending on the art style and story
Futanari - Depends on the art style as...