I don't know about Micro Machines and the ski game, but I thought ATV 2 was pretty well done. I played it for a few hours once, haven't had a chance to get back to it yet, but I enjoyed myself. I'd of had guessed it would've been rated higher, but perhaps I'll agree when I get back to it.
I never cared for the Micro Machines series, I'd rather do top down multiplayer racing with the whole track is visible like in Super Sprint, Indy Heat, Super Off-Road, Badlands, Sprint 8, etc. Never cared for how Micro Machines works, I don't like breaks in the race when someone falls off screen.