As a GM you have to know when to stamp your foot down in a variety of situations. It could be member fights, or even an unruly player. Even people that get funny about their character sheet need to be put into place. You have to sometimes be diplomatic and remember that even if one member may get annoyed or upset at you, you have a group that are standing by your opinion.

I would also,if it's your first time GMing, start with a small group of people. Up to 5 members in total. Larger groups can require a bit more work and you need to know your limitations first in your GMing abilities. You can always expand out and increase the size later if you so desire, but that's easier than trying to trim back and remove members.

Lastly, this is [color=ed1c24][u][b]YOUR[/b][/u][/color] Roleplay. What you say goes. If you want people to have certain attributes, then they have to abide by your rules. Great example I had one time was I wanted a steampunk like world with minor world changes, and character abilities... and one application I got was a legless man in a flying wheelchair with an elephant gun and magic abilities. When I knocked back the member I had another forum member have a shot at me saying that I was being unfair. In those situations you always have the right to choose who you want to enter so you need to stand your grounds.

:)