In my MP1 Mario's Rainbow Castle gameplay, Peach got chance time on the last turn and it made me swap stars with an AI that didn't have any stars! I freaked out.
My favorite is Mario Party 3 because it had the Waluigi board and it had the best items! Duel mode is intresting and it has the only story mode where the boss isn't bowser which makes it unique.
Don't get me wrong, I also like MP6 and MP2, but MP3 is definitely my favorite.
MP5 is actually my least favorite for the GameCube. I don't hate it though. I like that they added Boo, Toad, and the Koopa Kid, (They're so cute!) but I REALLY suck at the minigames. MP6 for life.
I've seen an AI use a cellular shopper and then say no to the shop. What a dumbass. I also saw Peach get another plunder chest from the plunder chest. Then there's Donkey Kong, who always goes for the Bowser Bomb.