I like them, I love my Mii, it really looks like me.
I would also have liked an update with more features, but seeing some of the stuff people have made on the Mii Contest channel just shows me I haven't been inventive enough.
With regards to their inclusion in games, I don't think Nintendo themselves has skimped on using them (looking forward to MK:Wii) but then I wouldn't want them in all games anyway.
It would be cool to have some sort of adventure game with a Mii option, or perhaps an 3rd Person Shooter 








