Yes it adds great challenge to TF2 when suddenly I start strafing into a wall and blurt out "hetrjugfduvrt@@@$#" shooting wildly because my cat decided it was time to jump on my keyboard and get me killed.
I grew up hating cats due to a few foul encounters. But about 5 years back I was sleeping at my ex-girlfriends house and I woke up with her kitten cuddled on my shoulder/neck. Been in love ever since.