I just remembered there was one 'mobile' game I did enjoy.

When I lived in Japan there was a Dragon Warrior hack and slash that I downloaded to my cell phone and played on the train ride to work every morning. I became hopelessly addicted to it, and would even play it at home from time to time, when I couldn't sleep cause my girlfriend was snoring or something.

For the record, even 5'3 stick thin Japanese girls snore.

Oh, but that game was a free download with far better production values than anything the American cell market puts out. And it'll never be imported to the states.