graduitited
I think this is supposed to be gratitude, right?  Anyway, why would he need to show any to the townsfolk.  Although I suppose he should be considered a hero, he might not necessarily think himself as one.  He did what he needed to do and I could see some people who do that want to return to their normal life while others would want to accept the praise of the town.
Although depressed might be a little extreme, I could see it being a possibility.  A man from a smalling farming village has his town destroyed so he goes to kill to person responsible.  While doing so, he sees the huge, wide world and realizes what little he has at his farming home.  He ends up killing the person responsible for the destruction of his home and though he wants to return to his people, he feels he cannot live there anymore because he seen what was beyond the horizon and knows that is better than what he has.  The only thing to make him happy again is to go live in a big city or something.
It makes a lot of sense.  However, are you trying to work a character like this into a campaign of yours or is this for a short story or something?  I've written my thoughts on the subject, but I don't really have a goal for it because I'm unsure what you want from us, if anything.