DC sucks ass. It has Batman and nothing else. Admittedly Watchmen and V for Vendetta were published through DC, but they weren't really DC's work, and they forced him to leave via being twats about his work. DC also seems to copy everythign that Marvel does but make it seem crappy (lol@metahumans)
Marvel has much more flawed and interesting characters whose weaknesses go much deeper than stuff like kryptonite. Emotionally, their characters are much more interesting, and, imo unlike DC, their comics seem to be trying to say something, particularly X-men, which was all a not-so-subtle allegory for racism and homophobia.
Both, like most comic book companies (talking about Manga here too), have an extreme issue with milking their franchises. At one point or another, Spiderman, Batman, X-men, Superman and all those others should just end. Finito. Kick the bucket. Be done away with, and only be brought back as a reboot decades later at earliest.
Also, as for the whole Marvel Universe thing, they seriously need to drop magic, spirits and ghosts and gods from the whole thing; it ruins it. It should sci-fi or fantasy. Not both. Same goes for you, DC, with your crappy copied universe thing.