I'm with the Jungle Beat camp. Totally should have made the list. Thinking about it, I want to play it right now.
SSBM is simply the best fighting game ever created. The depth and flexibility of the game is astounding. My friends and I will all play together, but whenever we play, my one friend and I are sure to go one on one at least once. We'll only have five lives and the match might last a half hour or longer. We're so good at avoiding each other that we hardly ever accumulate damage. It's incredible to experience.
I'll also note that while I really enjoyed Resident Evil 4, the game was way too long and repetitive. I was ready for it to end when I finished the first disc; I remember being disappointed when it said enter disc 2. It was just zombie, shoot, zombie, shoot, with only an occasional boss as a terrifying breath of relief. I mean, I did enjoy it, but it got less good the more I played.