Yeah I've played more Mario Kart than Smash Bros. and am only a very-casual player of either (... but this surely describes the overwhelming majority of people buying and playing these games?) so I wouldn't claim with some kind of authority that Melee's the best Smash Bros., but all the ones since have felt way too fiddly for me and I didn't enjoy them at all, despite really liking the first two entries in the series (and especially Melee).

Another case where my "nostalgia" one is the N64 game, not Melee, so I don't think it's a nostalgia thing making me prefer the Gamecube version.