I'll admit the Android platform is lacking in terms of quantity when it comes to games, but not quality. Here are some some of my favorites:
1) Emulators. Snesoid, nesoid, GBCoid, Gameboid, PSX4droid. iPhone users will never have the joy of reliving their childhood memories.2) I hate scrabble. I love Words with Friends. 'nuff said. (can also play with iPhone users)
3) You've just created your own game company, can you make the next blockbuster? I have never played through a game so many times, I think I'm on my 47th run.
4) Loved Galaga/Space Invaders growing up? Yes-you'll love this, No-you'll love this.
5) Ok, so may or may not be considered a "game", but no less addicting or fun. Can you stump the self-proclaimed "genius", Akinator, in a game similar to "20-questions"?