My favorite Ninja Turtle! Because swords are awesome, especially to a four year old Matt Herms.
I was a huge Turtles fan - but probably not to-scale compared to others of my generation. I picked up some of the original Eastman/Laird books - the ones that got colored and collected in trades - when I was around 9 or 10 and it blew my mind how violent and awesome the turtles were! I also read the Archie TMNT Adventures series off-and-on. Good times!