I fully support Prince's stance on GM's. As a GM I have made some rather horrid mistakes but there are at times roleplayers whom aren't living up to expectations or prospective roleplayers whom don't understand how the GM is running the roleplay.

Likewise I'd like to complain about people whom don't acknowledge their inactivity. People who don't post in OOC or through PM's to inform the people they are playing with end up killing roleplays in some cases.