Personally I'm a slight hybrid Fighter because that's the most fun way for me to play. I hate focusing on a single type of attacks, as it makes battling more boring to me. I rather have a set of lesser needed moves, but have different uses and cause a lot of variety in your gameplay.

I'd say go for Fighter if you wanna mix hand-to-hand combat with energy attacks(mostly used to start a battle or used with a combo). Go for either Crane or Turtle if you mostly love flashy ki blasts and shiny moves.