I can't believe noone mentioned Puzz Loop. It's the only game I can get my fiance to respect me for playing, what with its funky beats and flashing balls in their conga line of slow approaching inevitable doom. Also, I built a spinner for eight bucks using a hodgepodge of the guides you can find in the faq--well worth whatever time you put into it, for the games, the ladies, or whatever.
KenToad