Honestly, MvC3 is actually the easiest to play and learn
However, SF4 is good to pick up and play and prolly the best place to start. Goes well at teaching all the general stuff about fighters......except the links. This....prolly has the most bullcrap link system ive ever played, but other than that, the game is great all around.
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Nice catch BlAcK TuRtLe.
But too bad your ass got SAAAAAAAAAAACKED.*tackles*