Ork Bikes ROCK! Okay maybe they don't really rock in the game, I have yet to play a game with them, BUT I will take them for a number of reasons.
1. They move fast
2. 18 inch Twin Big Shootas
3. They give other units they drive past a cover save
4. When/if they blow up you can laugh cause thats what Orks do, fight, drink, and laugh at everything. That was one of the deciding factors for me to start Orks, they are the ones that know how to have a good time.
that and the fact that I myself have an unhealthy obsession with SPEED!
(as in roller coasters and driving with the windows down, not the "drug")