'91 Rocky Mountain Fusion as a commuter (and possible occasional trail rider).
I bought it 'as is' from a local bike store/recyclers, dirty but my size. It was stock, cheap and didn't work very well - the crank, chain and cassette had been replaced and then hardly used, but the der. pulley wheels were like throwing stars. Cables were shot and the Deore XT/DX shifters (I had one of each) were knackered. So strip completely down, clean and grease, all new cables, brake pads, replaced the pulleys, a handlebar I picked up ages ago in a junk shop, Sunrace friction thumbies. It is crazy comfortable as a commuter, came out way better than I expected, shifts and brakes really smoothly.
Replacement seat is on the cards. I'd like to get fenders as it is a commuter, although not hugely urgent as we come into summer. I suspect that the rear u-brake + fenders will probably limit tire size, those are 1.95s right now. Once I'm certain I like the handlebars, I intend to tape some of the chrome to tame the cabling a little more. The bar ends out front give me lots of position choices. A cheap, fun ride.