I've never liked the concept of a hero battling himself. A doppleganger or someone with similar powers? Sure. But not a hero battling himself. In my opinion, it's a contrived Pre-Crisis solution, leading to questions like "Could Azzarrello's Superman beat up Rucka's?" or "What would happen if we killed all but the one that we were using before and just call this thing an experiment?" I just don't really care for these kinds of things. Call me crazy, but I rarely like crossovers. They have to be pretty friggin' astronomical for me to buy 'em - like JLA/Avengers (which I'm not really all that keen on, truth be told) or Marvel vs. DC (which I pretty much hated the ending to and the voting system used).
Basically, it's a matter of personal preference, but I just dislike it very much.
