Several things push my buttons and not in a good way (sorry ladies). A major one is pedagogic condescension.

Rule 1. Don't be hard on yourself. If you want to enjoy singing, enjoy it and don't beat yourself up. That way lies stress eczema, nervous ticks, major chemical relaxants, nervous breakdowns, and worst of all, Amy Winehouse.

Rule 2. If other people are critical, see whether they can do any better.

Rule 3. As a corollary of 2 above, don't listen to me, I'm crap. But I enjoy what I do, so now who's better off, me or the schoolteachers?