This guy's opinion on multiplayer was about the only thing I totally disagreed with him on. Now that he's clarified it, and even seemingly retracted it a bit, we're back on the same page.
I have the opposite of what he has though. I don't mind loosing, but winning makes me feel like a pro. That's why I loved introducing people to Guitar Hero back in High School. They got their panties wet over completing a song on medium, and then I'd come in and ace a solo on Expert, leaving a crowd of slackened jaws in my wake. It was very rewarding.
The only thing that pisses me off in multiplayer is not being able to play. That's why COD gets on my tits so much. It's not getting owned (though sometimes it is when some idiot picks up the bomb and just sits there camping), it's going 24 and 2 in Free for All and then getting disconnected from the server. Instant ragequit. Must be my router.
Incidentally, I much prefer co-op to competitive play if I'm with people I know. With strangers, I'd rather just murder you.