Had mine since GT3's launch day and it still works - sort of. Reads PS1, CDs, DVDs and regular PS2 games, but not the early PS2 games that had the blue disc surface (if that makes any sense). Could be due for a laser replacement me thinks.
Anyhow, I gave it a solid cool rating. It's part of the last generation of systems where you could just put a game in and play it. Not wait around for it to sign in, do a facial recognition test, attempt to play the game, have to update it, restart it, only for it to tell you that you can't play it properly since the servers are down. Also the last generation to use memory cards - those things were rad.
I personally have fonder memories of my GameCube, as it was the one that was in my room and could therefore sink more hours into.
Even so, the console's popularity meant there were a raft of series' that you could only get on it, which today means you can get ridiculously cheap games and enjoy them just as much as any big-budget, brand new release. On the flip side, the popularity meant you got a glut of awful shovelware and nasty movie/TV tie-in releases that capitalised on that fact.
Slightly off-topic; is Enthusia really as good as people say it is?