I've had quite a few bikes over the years, but the one I ride on the road now is a track bike I bought second-hand about 8 years ago. In that time it's used up a few bits and pieces and has hit the deck on many occassions (last time was last week). The drop-outs are bent, the frame has been welded where it cracked, it's been hit by a taxi and sent into space, it's collapsed one headset and one bottom bracketset...but I love it.
Before I moved across to Miri in Sarawak (Malaysian Borneo), I was living in Kuala Lumpur. I used to go for a 75 - 100km ride on Sunday mornings with 10 to 20 other riders, all of whom rode multi-thousand dollar bikes. Riding on the flat sections was always fine, but we'd always do some decent hills along the way with 10 to 15 km climbs. Here the fixie, with it's 165mm cranks, would knock the shite out of me, but I could still manage to summit in around 5th against the multi-geared magnificents. Riding down hill for 15km on potholed roads on a fixie can be a pain in the ****, though. Everyone else is freewheeling while you're spinning flat-knacker, bouncing your cods.
Back when I used to race road & track, I could justify having the best I could afford. Now I get bugger-all time to ride, have a growing family (in Australia) and can't justify throwing $ at a bike. I love riding my crappy old track bike on the road. I still get the holeshot at traffic lights and get nearly as much pleasure from doing trackstands as I do from riding (less sweating involved).
When I started racing road back in NZ, there was a veteran who rode scratch on an old Hutchinson with mudguards and a dynamo light set. He beat the **** off most of us on our Colnago's etc. He was the one who taught me that the rider is usually more of a limiting factor than the bike.
To each their own. Be happy with whatever you've got. It's certainly nice to ride a good, light bike, but it's more important to be happy.