Tales/Infinities have been the highest-quality stories in recent years, I think. When there's no "canon" to weigh the stories down, the writers seem to have more fun.
Normally the heroes/villains authors come up with just aren't strong enough to stand up on their own for a full-length story (actually a reason why I like the cartoons usually - they can make cool-looking characters while focusing on a short, self-contained story).