It's very hard to pick. Every one of them (all three) had their awesome pieces. The N64 started of with a new formula that is still enjoyable. To this day, I even play it against others online because it has less lag than Brawl! Then Melee came and improved in every possible aspect: Gameplay, maps, way more characters, Tournaments! Everything went better! And then there was Brawl that kept improving everything... except gameplay/character movement. It also could have had WAY more online options available but Nintendo completely screwed up that part. Luckily, I hardly ever used online and only played it with my friends so that wasn't really an issue for me.
All in all:
N64: 8/10 (although, a big plus for being first)
GC: 9,5
Wii:8,5







