I can see how he might have a brooding loner vibe. Especially that part where he went kind of dark after Uncle Ben died. But I think mostly he's actually a little too cheerful and friendly to really be considered a brooding loner. That scene where the girl asked him to take a picture of her boyfriend's car? A brooding loner would have told her to piss off or walked away from her without dignifying her stupid request with a response. He smiled and said yes (his "that's so thoughtful of you" cracked me up), happy that one of his peers is being nice to him for once, even though he knows very well that she's just using him. He strikes me as a guy who does want to make friends, it's just that most of his peers are either awful or indifferent to him. And he's kind of afraid to "put himself out there" because it's so awkward for him. Which is how he usually ends up hanging out alone.
It seems he's in yearbook club? For some reason he takes pictures of various school activities and put them in the display case at school. Hey, being a photographer is the perfect activity for someone who wants to interact with people but hide behind something at the same time.
Tobey Peter was a photographer on his school newspaper and in the chess club but apparently was bullied by a lot of people (bus drivers, no one let him get a seat on the bus, college classmates, etc) and didn't really talk to or was friends with MJ until the end of his senior year if you go by Spider-Man 1 while Ultimate Peter only hung out with Harry Osborn who was the popular rich kid on the basketball team and best friends with MJ(who has some of MJ traits/background but was more like Gwen) since childhood and hung out with more people after he became the star basketball player and quit and later hung out with more people after he became Spider-Man and 616 Peter was loved by his teachers and occasionally hung out with the popular kids who made fun of him but was otherwise an outsider in High School but Spider-Man helped build his confidence and in college he met people like Harry and Gwen thought he was snobby when his aunt was in the hospital but they eventually became close friends among other college students.
I forget, did he ask Gwen out or did she ask him out? In any case, she became more approachable to him because she was nice to him first.
Gwen seems to be the only one who cares/acknowledges about Peter even before the accident seeing as she stands up to Flash before he beats up Peter even more, how she's the only one to ask Peter to go to the nurse and see if he's alright when everyone else(except for the guy who kicked his camera) pretty much ignores him and he sits in the back of the class quietly, she jokes about Peter being the second smartest in the class, Uncle Ben had to start the conversation that led to Peter joke around about how Peter has the pictures on his computer, besides Flash she was the only one in the school to comfort him after his Uncle died and asked him out to a dinner at her family's house because the last conversation Peter was stuttering/nervous when talking to Gwen trying to ask her out after Uncle Ben basically started the conversation (Gwen in the early comics was interested when she first met Peter but since he was worried about his Aunt May who was stuck in the hospital and she also feel like Ultimate MJ in USM#1-13)
Oh, yeah, and I forgot to mention that he clearly didn't mean to beat up the people on the subway. It's just that his new Spider-reflexes went into overdrive when they came at him. But he kept apologizing to them anyway, even as they kept attacking him. Such a good boy with such good manners. Hee.
Anyway, he only seems to brood in situations where it would make perfect sense for anyone to get broody, like finding the briefcase belonging to the father who abandoned him, losing the uncle who was like a father to him, turning his mentor into a monster, and getting his girlfriend's father killed (and having to promise not to see her anymore). Brooding in these circumstances just makes him human.
We have to remember, unlike us, he doesn't know there's anything more to the story. As far as he knows, dad just discarded 7(?)year-old him with a stern "be good". I was like "wow, that's cold".
(When I saw the movie the only good/true reaction he has to the lost of his father was when he snaps at Uncle Ben before running off to the convenience store, he doesn't really seem to enjoy or think about talking about his parents, he shifts his glances when someone mentions his dad and when he was told he looks like his dad with his glasses on he immediately put it above his head and looks downward.He he is not a kid who likes talking about his problems or revealing his emotions often like most kids his age.
To see a dick and *****enozzle of the highest order playing at being Spider-Man, see Peter Parker in the Ultimate Spider-Man cartoons. I haven't been able to bring myself to watch anymore episodes of that lately, I'm afraid it would ruin my Amazing Spider-Man high.