Too many different bikes, I commute on any of them given my mood and plans for after work. My SS/FG commuter is a Bianchi San Jose, currently set up 39x17 fixed. 42x17 is better for general riding, but this is also my cyclocross bike, and they like the courses hilly around here, so I swapped out the 42T chainring. thinking about getting a 15 or 16 tooth cog for the commute.

This is probably my most fun, versatile bike. not sure why i haven't been riding it more lately.