I've been reading Batman for a long time, its great. Spiderman is good too, except I'm not as into it as Batman.
I've read a lot of Batman story arcs and liked virtually all of them. I remember reading a story arc from Marvel about Mephisto's Son Blackheart in Circle of four and I really liked it.
I think I'd like pretty much any story arc with good writing and decent artwork from DC or Marvel. If you guys know any could you suggest some? By the way, if you know any good Mephisto or Blackheart story arcs it'd be cool if you could mention those first. Thanks!