Squall's my favorite male protagonist in FF series. But I will like him more if SE will give him a chance to develop his character in a positive way and in a new story lol. I guess his personality is an effect of what they call "childhood trauma?" I'm no expert in psychological cases lol but I think it's one of the valid reasons. Let's admit it when we were kids (ok, not all of us) we are so emotionally vulnerable to almost everything that we are afraid to lose something or someone like our lives depended on it. Be it a toy, a candy or a pet. I guess that's what pushes Squall to create his "own world" when he learned that her Sis Ellone, who had been his source of emotional support and comfort had been taken away . He doesn't want to show anyone any signs of weaknesses and that's why he is misinterpreted as an introverted jerk and eventually had difficulties interacting with other people as he grew up.

But ofcourse like what his friends are trying to tell him, he'll never be understood by other people if he refuses to speak what's on his mind. He belongs to some of the "what's his problem?" and when he speak "ah, that is why" case.