Actually Spidey's pretty positive nowadays. Even after what Otto did to his life he Still put a smile on his face and was just all like "YAY Im ALIVE" and this is coming from a superhero that got molested as a child?
Yeah. Even when Black Cat fucked up his company he was just all like "Nobody got hurt.... THIS WAS A GOOD DAY". And when Madem Webb asked him to give up his powers he just says "Why? There a gift, not a curse. throwing them away would be the most irresponsible thing to do" If anything Logan wines more then Peter has been for a while.
Seriously! Sometimes I look at these superheroes and think, "you can fly, why the hell are you just sitting around brooding?" If these guys can't find something to be happy about, them why are the rest of us even trying?
...then I look at Deadpool and remember that I can buy tacos *whenever I want* and maybe that's why we still try.