I don't know if I necessarily gain anything from being competitive. I compete simply because I think that it's fun. Regardless, I still try to keep the feelings of others in mind. Therefore, even when I really really want to, I often refrain from yelling, "Suck it, bitch!"
I suppose that I could gain the knowledge that I'm better at something than someone else. . . but honestly, I think more about the billions of people out there that are still better than me. Except for Snake. . . I'm definitely the best Snake player EVER.