I don't know why I'd play the first one when the next two are just superior in terms of minigame count and also just board mechanics. The first one didn't even have an item system, and the third one has items that most closely resemble the fun stuff from Mario Party 4 and eventually the orbs in Mario Party 6 which further refine the items. First one had some mean spirited lose states too, which some might find amusing but I'm pretty sure it made some kids upset and that's why Mario Party has been generally been less mean to losers. Especially Super Mario Party where they'd be disappointed but they still clap happily for the winner.