I got a Langster because I wanted a bike for all around riding, and what do you do when you're doing all-round riding? Shift gears? Hell no! You keep it in one gear all the time, and just get used to pushing the tallest gear that works as you get more fit. So why carry around all that extra crap on the bike? Plus, a bike with all the gears costs almost 2x as much and for general riding you're not going to use that stuff.

The fine-tuning of speed that's possible with a fixie is what has me interested in going over to fixed fairly soon, and I notice there's much more of a need for it when riding with a group or in heavy traffic.

I'll keep a front brake though, I wore out enough tires doing skids when I was in grade school!