it sucks when ppl see holes in your playing, especially when they're not justified. The singer in my old band was terrible for that. He wasnt musically talented at all, he can barely sing and nobody else in the band likes him much. But when we would jam, it seemed to be him that had ultimate veto power, if HE didnt like a riff or a song, we didnt play it. It sucks when someone who cant even play the guitar, is criticising your playing.
He would act like a little child if any of us told him his vocals or lyrics werent good enough. He was all smug after we recorded our demo, as his vocals sounded alright. Mainly because me, the other guitarist and the engineer who owned the studio, spent 3 hours pro-tooling his vocals to make em fit better!
He also had no sense of rhythmn, sometimes simple count-ins were too much for him, he frequently came in too early/late, and couldnt understand certain riff timing ideas, (think glassjaw - pretty lush) he couldnt hear the difference... what a total fool.
The scary thing, is that the band is still going, and apparently had some label interest from Sony! jesus wept!