Our principal attends almost every meeting. He has veto power over any decisions made by PTO, but is careful to let us run our organization. I can't imagine that our principal would want to be involved in every vote. The details of organizing events, the paying of basic bills, etc... most decisions aren't that exciting - unless you are the chair in charge of that event. Our principal becomes much more interested and involved when discussing major purchases or major changes to our activities. In those areas we always get and value his oppinion - but not his vote.