I feel your pain Reese. It's even worse when it's your own spouse that will tell you that your a terrible singer. These days, I just don't do vocals when she is around.
How about when some one calls your song boring on the song forums....really...is that neccessary? I have always felt that there is always something to build on; rather than just knocking something down.
I have n't had a chance to respond to Robbies thread up there yet about being just fascinated with the song writing process in general, but I whole heartedly agree. We who create have a gift that a lot of others just don't. Where it comes from, to me, is fascinating.