Hat suggestions:
Pot Head - Potted plant hat
Creature Features - Animal Masks
Anon - Anonymous mask
Companion - Portal Companion cube as head
Nosy - A human nose
Sniper - A small blockhead with a rifle sitting ontop of your head
Easter Island head - Self explanitory
Wowzers - Eyes popping out of the blockhead
K/O - Small stars around the head
Lady Liberty - A model of the statue of liberty's head blockland style
Darth Vader - Self explanitory
Brick Head - A brick that goes over the players head
Katamari Hat - The head of Katamari (from the video game)
Loud Mouth - A megaphone
Cat - A Cat head (smooth model, not blockish)
Agent - A bluetooth headset and some black glasses
Beards - A pack of beard hats
Mustaches - A pack of mustache hats
Steve Hat - A minecraft 'steve' head
Shoop - A Dr.Octagonapus face hat
[/end hat list]