Despite Melee being focused on multiplayer, its single player is still a deeper experience than most fighting games are in single player. I mean, what do the other fighting games have for single player? Fight each character one at a time, until you fight the boss. Melee has that in Classic mode, it also has Adventure mode and Normal mode (which mixes in some challenges along the way), it has Break the Targets (with a custom stage for each character), it has a bunch of different Multi-Man Melee games, it has Home-Run Contest, it has 51 event matches... in short, it's got many times more replay value than the rest of the fighting games. Brawl is going even further, but Melee had quite a lot to offer when your friends weren't around to beat on.
Still, if you don't like fighting games OR multiplayer games, well, yeah, Smash Bros. is not for you. :)
