Mario Party 7 is my favorite party game but don't buy it if you don't have a second controller, single player mode can be very boring. Mario Party 7 has a good variety of mini games, lots of them have fun platforming gameplay like Apes Of Wrath and Fun Run, and in other minigames you may be in a car, or you may be riding a robotic bee, lots and lots of the minigames are fun. The gamecube mic however is a bit of a pain because you need to use an american voice, but a good thing is that you can turn the mic feature off.
This game can be very fun and is worth a look at