oh, this one is hard -.-
fist that would be One Piece , am a huge fan of luffy's ability and tough times to be a pirate king. Though damn it's taking a LOT of days, months or years to update am still gonna wait until he becomes the PIRATE KING. His awesome that way i guess. THe plot was never boring for me, the fight scenes are just totally epic and i must say am a sucker for comedy and action. This one could really make my day ^^
Second would be Seven days, the very first shounen ai i have read !! and i was sooo damn founded then start reading yaoi after that. To those who haven't read the manga and is fan of yaoi or shounen ai then i recommend this. It has such a sweet romantic story, it has it's lesson in life and how two people meet in such an unexpected time and day. It was really worth it and faun.
Third would be Flowers of evil , such a very realistic incest i have ever read. Am a fan of incest story and this one is sure a very exact way of describing what incest really mean. I t brakes the usual forbidden love story their is to it and you need a big hear to cope up with such story and not ending up sobbing the whole time.
that's pretty much, my fave in every genre