I have an old GT hybrid from 2002 (about $700) - back when hybrids were more MTB style and before I really knew anything about bikes (not sure I still know a whole lot!). I never rode it a whole lot, and I've since gotten other, better bikes. In hindsight, after riding much more on my current bikes, I realize that the GT the LBS sold me seems one size too small. Based on sizing guides, etc. I probably should have gotten a "large", but I was sold a "medium". At that time, I didn't know any better and I recall it might have been a trend to go for a smaller sized bike too.
I never did feel that comfortable on the GT, and I think it's because I don't have enough front-to-back spacing. I can't move the seat back anymore, and I'm not sure I can re-position the handlebars forward anymore (maybe I can lower the stem a bit). I've been thinking of offloading the bike, but I doubt I can sell the bike for much though because of its age, eventhough it's in pretty good shape still.
I was thinking that maybe the bike, with some modest upgrades (such as a lock out front suspension), could be turned into a casual commuter, particularly in the winter since it's an aluminum frame with 26" wheels. Any suggestions on what to do to make it more size appropriate? Is it even possible? Is it still worth it?