this may kinda sound nasty but I know from personal experiences:
*my man likes it when (when you go "down" on him) lick the spot between his "goodies" and his anus. he'll really like that.
*my boyfriend also likes it when I put my breasts on his back while licking his ears and biting em.
once you get to now your man, you'll know what he'll like. but that always works for me. hope it wasn't too explicit ;-(