Yes, I'm this way. Outwardly, I don't mind losing, besides I've seen what bad losers look like and wouldn't want to be that way anyway. However I rarely lose and I think I still don't like losing that much inwardly, because even if it doesn't bother me, I don't *want* to. Given the choice between winning, surrendering or throwing, I'll always play to win.
On the other end of that, I feel bad when I'm winning competitive games, because that means somebody else is losing. I'm a very remorseful person so, that probably change. It doesn't stop me from playing my best though. It gives me a slight preference towards single player games because it avoids the drama and jealousy of multi and even co-op games.
When I do something, I generally put enough effort in to be the best that I can be at that thing.