Anything from official books that isn't setting specific.
Unearthed arcana and homebrew is mostly fine as long as it isn't overpowered. Generally ask Schyler (DM) before hand.
No flying races. Nothing that gives flying at low levels.
Elite array for stats: 15, 14, 13, 12, 10, 8
or Standard Pointbuy (27 points)
When you are ready, post your character to the character roster.