I did like my Wii
but the kids have it now - not enough 'mature' games for me (and yes I played Metroid and Resident Evil 4). Main problem for me was - as soon as I bought a HDTV it looked like CRAP. Eventually got a PS3 to make the best of the tv it was attached to - I think Nintendo got their timing wrong on how many people would get flatscreens - hence looking crappy in an age of HD games.
Just my take - but if a Wii 2 was backwards compatible with older games - and upscaled them - I MAY be tempted back - but not with a catalogue of shovelware.