The speaker is telling someone, apparently named Hans, why they like him, and the answer is not grand or dramatic. It's all small, everyday stuff: a cute text about siblings, the story behind some funny scars, a shared habit of swapping horror stories. The title, "i like you for that," becomes a refrain that closes nearly every stanza, like a gentle, repeated confession.
What the speaker seems to value most is the way Hans accepts and listens. He is stubborn, and he has a past, but those things are part of why he is liked, not obstacles. The opening hints that these are qualities "others didn't like" him for, so the speaker is quietly saying, "I see you differently." The last lines, where Hans listens to the speaker's stories and the speaker likes him back for it, make the feeling feel mutual and balanced.
The mood is warm, shy and sincere. The plain wording and lowercase style feel like a private message or a whispered thought.