You have to pick:

All I can think about is the ability to choke someone to death with my hair. o A o

In that case, I would rather you picked the other option.

having that sort of control of your hair would make styling very easy.
"lets see....quiff...nah.....spikes....nah.....MOHAWK OF DEATH!!!"

I think I should wax my entire body anyways.

Could i cut my hair without pain given the fact that it is innervated, will it respond to my emotions?

waxing my head seems like it would be really really painful

That's interesting. I assumed it couldn't feel anything, but if I imagine my hand not being able to feel it would would definitely impede its use.