Would you tell me honest truth about my voice?

I sing a lot. I'm in a lot of choirs, but I don't believe I'm good.
I'm not asking for positive feedback, but I'd just like to know what
you really think of it.

http://www.youtube.com/watch?v=i1LHvBoo6Hcfeature=channel_video_title

Thank you very much.
Please explain, also, what is good or bad about it.
:D Thanks!