I think both sides have ups and downs.
I personally stopped playing league tennis, not because of the guys on the other side of the net, but for the guys on my side of the net.
I just cant get competitive spirits going when playing tennis, I dont want to talk strategy, and I dont want to single out the weaker player.
I want everyone to enjoy the game.
With that attitude I quickly came to realize that most of the guys on teams don't agree and want to win.
So in order to be fair to them I stopped playing league and became a sparring partner for the team. They call me up on every practice but I dont need to play the matches.
Works for both.
Being ultra competitive is not a bad thing as its made out to be many times, and neither is being not competitive at all.