For me, probs Magi: Labyrinth of Magic. It's pretty long, has good art, and is a very well-rounded series. It can be comedic when I want a laugh, but can be all serious and philosophical when I feel like reading something of that sort. It's exciting and action-packed, but can also be fluffy and shoujo-like with some romance here and there.
Also can be porn because cute boys. I wouldn't have to worry about my fap material.