Either ride your bike & feel flashy, or look on craigslist for a cheap beater and ride that & not feel flashy?

I used commuting as an excuse to build up a commuter/touring/whatever bike - but I didn't really have a safe place to stash my bike at work. I can lock it at a crowded bike rack full of old beaters that might crash on it and it'd get rained on and stuff.

(I'm still convincing myself that I had to build a commuter)