Well this is probably the Q that has been asked the most ever in this forum! But hey, as u said, ur new - and I think people always like to answer it so:

MK1 ~ Reptile (k, he wasn't playable, but he kicked much ass) and Sub Zero.

MK2 ~ Shang Tsung and Sub Zero

MK3 ~ Sub Zero, Kung Lao and Cyber Smoke

UMK3/MKT ~ H. Smoke (plus my MK3 ones)

MK4 ~ Liu Kang and Raiden

MKDA ~ Kung Lao, Kenshi, Scorpion and Frost

MKD ~ Ermac, Sub Zero, Liu Kang, Noob-Smoke

MK1=Sub-Zero. His Fatality sold me. I loved his Fatality.

MKII=Baraka. It's the blades man!!

MK3=Hated MK3 but if I had to pick it would be Kabal. In MK3 he had huge combos!

UMK3=Rain. Even though he doesn't supposedlly exist. He is still a big mystery to this very day. That is why I like him. The one secret no one has discvoered.

MK4 and MK Gold=Quan Chi. His Leg Fatality is funny.

MKDA=Hated it but if I had to choose it would be Sub-Zero. He had the only Fatality in the game that was realy different.

MKD=Bo'Rai Cho. His Fart Of Fury realy sold me. LOL!!

My faves are Baraka, Scorpion, Cyrax, Shao Kahn and Kabal.

Favorites overall are Scorpion and Kitana.

MK: Sub-Zero
MK II: Baraka, Sub-Zero
MK 3: Sub-Zero, Kabal, Cyrax, Sektor, Smoke, Stryker
MK 4: Scorpion, Sub-Zero, Jarek, Reiko
MKDA: Kung Lao, Cyrax, Sub-Zero, Scorpion
MKD: Sub-Zero, Scorpion, Kabal, Hotaru, Baraka

Mortal Kombat - Sub-Zero, Scorpion, Liu Kang
Mortal Kombat 2 - Cage, Scorpion, Raiden
Mortal Kombat 3 - Kung Lao, Sub-Zero, Kano
Mortal Kombat 4 - Liu Kang, Raiden, Sub-Zero
Mortal Kombat Deadly Alliance - Sub-Zero, Kenshi, Sonya

Could you still believe that I have not played Mortal Kombat Deception yet?