Eren: All the time. This spagot will kiss you any chance he has, even if it's just really quickly. 

Jean: He'll kiss you on the temple in greeting, but he kisses your lips pretty often as well. 

Armin: Armin won't kiss you very often, he's uncomfortable with PDA, he will kiss your hands occasionally in public but usually will only kiss your lips in private. 

Marco: Like Armin, Marco doesn't like PDA, but in private he'll kiss you occasionally. He prefers hugs. :)

QOTD: Who is your least favorite character in Attack on Titan?

AOTD: Mikasa.