Nothing as Santa can't afford my expensive gifts. Also my family only does stockings, so our holiday expenses for the whole family seldom exceeds $40.00. If I could ask for anything though, I'd ask for the following in order:
Treadmill - I don't walk in the winter for health reasons so this is actually useful for me.
Laser-Eye Surgery
Any video games that I didn't already buy (Arkham City, Skyrim, Skyward Sword, Uncharted 3, Resistance 3)
Magic Cards (I'd like to build an Elf-Warrior deck with Nissa. A Black/Blue Zombie deck thanks to the enchantment that makes zombies cost 0. A green/blue/white Rafiq, Stoic Angel style deck. Any planeswalkers I don't already have a playset of)
A low-end gaming laptop which would primarily be used for D&D but also casual low end games like Plants vs Zombies and Diablo 3