Thank you striknein and EpicSchwinn. Finally some valid reasons for going fixed gear. I was beginning to wonder if there were any. I've been seeing more and more fixies around NYC and I've been asking around and it seemed like people were just doing it because they wanted to be like the cool kids and that's not my style. If I do something there has to be a reason, not just cause it's what other people are doing. I've got both cogs on my wheel and I ride in traffic to commute and on bike paths for fun so I think I'll use the fixed cog on the bike path for a while and see if I like it.