thread is still going? well here is my first post then!
I actually have the opposite problem of many here. I used to like my voice, but friends and family were lukewarm in response to my singing on some demos and live. After awhile I realized what they avoided telling me for fear of hurting my feelings: I suck.
It wasn't all bad-- I sounded ok on some tapes, but I had terrible consistency and often sounded awful. After 15 years of singing off and on, mostly on my own home studio projects (I am primarily a guitar player), I have improved marginally. I still pretty much suck though. With a lot of takes, doubling and creative mixing and processing, I can get the vocals to sound pretty good, but my raw voice is pretty lame.
Lately I have decided to take some lessons, because I can see I am not going to quit singing on my little projects, so why not try to improve? If it doesn't work, ah well, then f#@k it, I'll live. I have never systematically practiced-- just practiced songs until I could get them passably onto tape. Well, let me revise that: I have spent a few hours here and there singing scales and arpeggios in a half-hearted attempt at improvement. Who knows, maybe it helped, and I would suck even worse if not for that.
Fun to see there are so many other musicians with vocal issues similar to mine.