Several people in Awesomenauts make me cringe or do other various noises. Here they are in ascending order.
Froggy G - Hideous, can run away while being totally invisible, and the people playing him tend to be the usual "Cowards unless they have a gaurenteed victory and even then they can screw it up" type.
Coco - Has debilitiating thunder trails, is fast, and her massive heavy hitter Thunderball attack is way, WAY stronger than it needs to be. When I went into a cheering and laughing fit when I SUCCESSFULLY KILLED HER, after 20 hours of accumulated time, that's not a good sign.
But by far the worst is Raelynn - anyone who has played Awesomenauts will know exactly what I'm on about, but if not...Every 6-8 seconds or so she can bust out a massive Sniper shot.
Well, I say Sniper Shot theoreticly. It's closer to a goddamn Ion Cannon. It has a massive red line telegraph, but there's one significant problem - People can press the fire button again to fire it early. So, unpredictable, horrificly powerful, usable very often, and can blast you into peices before you even see her.
I know she's basically meant to be a cryo-frozen, female Sniper from TF2, but dear god, why.