When I first started playing Stardew Valley, none of the characters stuck out to me. No one really struck my fancy, so I was just going to go for the one I thought was the nicest and most approachable, which was Sam. I first met Sebastian in the rain at the beach, and I thought he was a bit too much of a stereotype for me to go for him. He was moody, didn't like talking much, and whenever he did want to talk, he would say gloomy stuff to the point that it was super cheesy. But slow and steady in the game I became friends with everyone, and I saw Sebastian's 2 heart event.
He was immediately my favorite then. The 2 heart event showed that he had a lot more going on than the hair; he was shy, a bit of an introvert, serious about his work, and a little tired of no one taking him seriously. As I got to know him more, I discovered quite a lot more about him, and he became such a well rounded character to me. He enjoys reading comics, likes animals, and he's a bit of a prankster and likes to mess with the status quo a bit. He's surprisingly sweet to people he knows well, and it's pretty obvious when he has feelings for someone, even more than other bachelor/ettes I'd wager. His negatives I find interesting too; I've always seen him as someone more bitter and angry and he has a bit of a mouth on him. He's someone who can go with the flow, but he will put his foot down when he's had enough of it. He's a bit of a pushover when you don't know him well, but after you've built the bond, he will be a lot more firm. To get along with Sebastian, you have to accept he wants to be on his own sometimes, and that he wants control over the few things he owns in his life.
Robin refers to Sebastian as shy, which I always thought was odd because he's one of the more standoffish and borderline rude marriage candidates at first, but with how he changes in talking to you and how he gets bolder, she was totally right. He is a pretty anxious and shy person at first, but opens up later. I found that kind of character refreshing, and in a lot of ways it was like learning about a real person. I think all the characters are written this way, but I connected with Sebastian first and found him the most interesting in getting to know.
Marrying him was even better honestly. I love his dialogue and how he adjusts to being a father himself. He does some self reflection about his relationship with Maru, and it reflects some family issues that I think are really interesting and plan to write an essay about sometime. His 14 heart event really solidifies that he's a gentle person at his core and how the farmer's kindness really helped him open up without removing his introverted nature. I dunno, I never saw him as an 'emo' type after my first impression. There's so much about him to love and 'emo' doesn't cover even 10% of it.