I'm fairly calm when it comes to that stuff. When I was a kid, absolutely nothing would get to me. I enjoyed playing games so much that it didn't really matter to me when I lost. I went through this phase - from 11 or 12 to about 16 - where I was prone to getting extremely pissed off at just about anything, which included games, and so I would often quit out or spend several minutes stringing together every foul word I could think of at the game in question, but that didn't last. Although, it did have this odd residual effect where, now, I'll mutter a few random cusses at a game when it's really pissing me off, but that's about the worst of it.
I lost one PS2 controller to a freak-out, and that was my little brother's. He and I were playing the first Battlefront together (we were on the Mos Eisley map, as I recall), and he was shooting at a group of Stormtroopers from fairly close range. They were grouped up so nicely that I couldn't resist throwing a grenade at them, killing all four or five of them, along with my brother, who was on my team. He was sure I had done it on purpose, called me an awful name, then hurled the controller at my wall. The wall survived. The controller did not. He's calmed down significantly since then, but he's still more prone than I am to curse at a game when it's going poorly.