Taxi and Pinbot are the only two pins I have right now! Pinbot remains my favorite game of all time. Love the weird music, love the look of it, but I will also admit I have more of a sentimental attachment to it than I do Taxi.
Taxi gets the love from people new to pins... All I do when someone new plays it is show them the characters and to listen for their callouts. This game is great at telling you what you need to do, and that makes it very approachable.
I'm giving Pinbot the slight edge as a players game, Taxi as a newb game. Can't go wrong with either, though!