Maybe you're one of the lucky ones who has a distinctive voice. It might not show up so well in the bass section of the choir, but in a duet is hard to blend.
Don't knock it! I've been singing like other people for years and never quite found my own true voice!
Most of the best singers of any genre have a voice that's instantly recognisable, wether you've heard the song before or not, so unless you find someone with a similar sound, you may have to find greatness as a solo act. :~)