In my college days, I made due with whatever bike I had. Since I became serious about longer distance, year-round commuting, I've been on the search for the perfect/ideal winter commuter. I know opinions on this will differ as will needs, but what do you think the perfect commuter looks like?

Here's what I think (I live in the Pacific Northwest):
-Cyclocross frame for fun geometry and riding style, fender clearance and tire choices.
-Titanium frame, since it's corrosion proof and durable
-Full fenders
-Kevlar tires in the ballpark of size 32 with a puncture resistant strip inside (flats stink in the dark/cold/rain)
-Some people will say singlespeed, but definitely going with geared with a set of trusty STI's (if I lived somewhere flat, SS might fly)
-Rear rack with panniers
-Bright light
-Disc brakes