no, man. There is a difference between underestimating yourself and knowing your limitations. I'd make a decent backup vocalist because I'm good with harmonies but my voice is too weak and too mediocre to sing for long.
Just think about it....lots of people switch songs after they've heard the good parts or perhaps fast forward to the lead section of a song even for good singers, how can a voice like mine hold people's attention?
I'm not trying to get people to disagree and compliment me on my "wonderful" voice here...I'm just saying what I think is cold, hard fact. It's one of the most upsetting things I've ever had to deal with since singing is one of my biggest interests...I love singing and I would kill for a good voice. If someone asked me to choose between Satriani like skills and a Bryan Adams or Bon Jovi type voice, I'd go for the voice. Even as a kid I used to think I had a great voice and it was very hard for me to accept that I did not.