Mario Party 6 is the first one to have mini-games that you play with the mic, which if you don’t like, you can disable. Besides the normal game (the boards) it has a special area where you play games with the mic, including a talk show! It is really nice.
It also has one thing that I love on some Mario Partys that is collecting the stars you earn in each game to trade for additional things later on.
The graphics are good, the gameplay is great.
It is a really good Mario Party game. If you’re looking for one for GC, this one is really nice. If you’ve never played any Mario Party, you should at least try one, it is very different and immersive.