I think the problem is a combination of Nintendo and greatly more so third party treatment of the system as far as game offerings and their quality. Most of the library is a mix of flash games, shovelware, garbage, and halfassed up B-team slaps to the face using known franchises. Other games, lots of lies from bought off gamespot/ign reviews with lots of fluff and made up hope to releasing mediocrity people on a budget wasted good money on time and again over the years. That's where I am on wii and outside of Kirby yesterday the last game I bought was Goldeneye which I got rid of (controlled like shit) and before that Mario Galaxy 2 or the SMB title whatever is newer unless Dragon's Lair or Metroid OtherM came out after those. I've probably had 50 games for it and I have like 17 now. Even when I do find a good game I can't get motivated to finish it just because it's on the Wii, I just lose it...last one I finished was Mario Galaxy 2, SMB6, Dragon's Lair, Metroid...got bored and stopped.
The only recommendation I can make, find something that looks uniquely fun, don't trust Nintendo as they screwed up a few downgrades to the market over their GC counterparts, and read OWNER reviews, not commercial and maybe you'll find something to love.