I have a bitter rivalry between the x33xx-1,2, or 3 guys (or whatever their names are.) I always seem to find these guys online in the only competitive lobby, so I've developed a less than friendly rivalry between the three of them. They are super satisfying to beat, but its difficult for me. They aren't too fast, but they work together to guarantee that you are behind them. I've had them dump three bombs and a set of mines in front of me when I had 10% shields, that didnt end well.