Izuku Midoriya:

Your cheek.

He loves to kiss your cheek Because he doesn't want to seem a bit too risky with it. Of course he'll kiss you on the lips In private. But in public he just gives you a quick kiss on your cheek and says he loves you.

Katsuki Bakugo:

Your lips.

He loves to kiss your lips Because it just shows everyone your his. Either it be a long sensual kiss or a quick peck. He also finds your lips really soft on his. He can't help it, he's a sucker for that crap.

Tenya iida:

Your hands.

Tenya, being the gentleman that he was raised to be. Often kisses your hands when showing affection. He truly believes that this is the most affectionate way to show his love when in public.

Denki Kaminari:

Your forehead.

Denki likes to kiss you on your forehead, he feels taller than you and he tends to make fun of you for it. But it's all in good fun. He actually just likes kissing you there Because he knows it's the easiest to kiss.

Eijirou Kirishima:

Your neck.

He likes to kiss your neck Because he knows it'll tickle you. He knows that your skin is sensitive there so he likes to see how you jump and act surprised. It's very amusing and he tends to be very careful with his teeth.

Mezou Shouji:

Your nose.

When kissing. He likes it to be direct, and quick. Unless you two are alone. So he tends to lean down and kiss your nose a lot. He finds it funny how your eyes watch his lips sometimes too.

Tetsutetsu:

Your shoulder.

Since he likes to cuddle with you a lot. And he sits you on his lap. The easiest way to kiss you is on your shoulder. He's very gentle when he does though, not wanting to hurt you Because of his teeth too.