I think MvC3 is really good overall.
It's horribly broken and atrociously designed overall. Mindless fun, maybe, but has no place as some top-tier competitive fighter.
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.