I liked Infinite Crisis, but WAS tremendously disappointed in how the storyline turned out, as they built it up to be one story and it turned out to be much different.
All of the material leading up to the miniseries indicated that Infinite Crisis was basically going to be a damn-near GLOBAL war between the heroes and villains, with the villains finally getting sick of the heroes' shit (especially since the League went all fucking loopy for a while there by brainwashing villains) and banding together under a common cause. It was going to be this huge, massive battle royale.
Then the miniseries began, and we found out, naw, it ain't about that shit, it's about Alex Luthor going crazy and trying to recreate the multiverse.
It was good, just I didn't feel like the story we got was as interesting or compelling as the one we were sold on. But hey, Superboy - excuse me, SuperMAN Prime, is one of the best villains, IMO, of the last few years. The image of him ripping apart Teen Titans with his bare hands while screaming "You're RUINING me!!!!" was fantastic.