In terms of the way they market thier characters and how they present the comics, I'm DC all the way. Those Absolute editions are a treat, and I have yet to find an equivalent from any other company. I also think the bigger DC characters tend to get some more interesting one-shot comics, or ones that work better as stand alone TPB. I can't think of something Marvel has done that reaches the same scale as New Frontier or TDKR.
However, I do like a lot of Marvel's characters (I got into comics through Spidey so I'm definetly a fan). Thier movies on the whole have been more enjoyable, but the amount they put out has produced some ghastly bombs.