Edit: so this my idea of a great old bike to repurpose as a commuter. I'll bet there are a lot of great old bikes there being used as commuters. What's yours?

Original post: OK so the title is a bit of a tease but I recently rebuilt a 1991 Specialized Team Stumpjumper and it is the best riding commuting bike I have ever used. The tubing is tange prestige and the parts are a suntour xc pro grease guard gruppo. The bike has seen some hard offroad use in the past. I was impressed with how well the suntour grease guard gruppo holds out over time. There is a lot to be said for being able to flush out the old grease from the hubs and BB. I switched out the saddle to a Brooks Team, the pedals to platform pedals since I like to ride with boots in the winter, and the handlebar to a trekking bar. I've never used one before and I think they're the bees knees so to speak. You can ride upright with your hands on the brake levers in traffic or dicey situations and spread out nicely when climbing or riding hard. I need to add fenders but I probably won't add a rack as I all I need is a messenger bag. Plus I really like the way the bike came out: