I like a whole bunch if get ups. I'll name them all, lol.
Kenshi - I like his how he levitates up.
Ermac - Same goes for this character.
Scorpion - Love his spear move since it is so popular, and how he get's up with it.
Sub-Zero - Because of how he uses his ice abilities to boost himself up, I love Sub-Zero, he's the best!
Raiden - Since I love how he just teleports and than does a couple punching moves when he gets up
Bo Rai Cho - Like how he farts himself up, lmao.
Noob-Smoke - Like both of there's Noob's teleport and Smoke's
smokey path up into the air and than down.
Dairou - His is just wicked with that awesome little kata he does when he gets up.
Thats about all, don't have an absolute favourite though...