I don't have much of an ego most of the time. Though being much worse than my friend in Brawl after I used to be better than him, and then evenly matched with him in Melee kinda bothers me. I used to be better than most people I knew at Melee, and when he started playing against me, he quickly became my match (partly due to me not having a working gamecube, but I never got that much worse just from not playing, so he did improve a lot). After that, neither of us played eachother much, and eventually Brawl came out. He has a Wii, and I don't, so now he's better than I am, and I struggle to get more than 1 kill against him in a 1 on 1 match :/
Still not much of an ego, but I really kinda wish I was more evenly matched, since we always had really insane matches when we were evenly matched.