As I own only four of the games (that could change this week

) I would have to say that...
1. 2 because when I saw this on the wii store I was hyped to play it. And I did! I bought it twice, one for my wii and one for my nan and granddads! To date I have played about 8 or 9 games of it. (I would have played more but someone burgled us and broke our rare telly

)
2. 8 because it was my first MP! So why didn't I get a Gamecube then? Cause I was chilling out on my PS1 and my 2 PS2s

But anyways, the game was highly impressive and deserves more than it gets today.
3. 4 because It was the last MP game until 8. 5,6,7 to me look... Suckish. Anyway, the minigames were quite good but there should have been more. As there was only about 63. Even MP 2 has more!
4. 5 because I saw this and I thought... Wow. Super Duel Mode looks epic! And of course I was wrong. At first I couldn't work out what the **** orbs did. At second I was screaming at the TV because this was not a MP game. It looked like a spin off like Sonic Shuffle or MP 9.
So you know what they say. The classics will ALWAYS be better, until they beat it.