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!!!"

always.

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

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.