The question was about "part of a body", so I'm assuming that if you picked the brain, it would be the whole brain. That would mean no emotions, no real creativity, no nothing that makes us humans. You would basically be a mindless, dead drone. No thanks.
This isn't true. As bloodshadow said
"Since souls don't exist, making my brain robotic doesn't make me any less human if my personality is intact."
Current computers can't express themseleves because they are really primitive, but robotic brain would be more complex and you could have emotions, creativity etc..
I think that human brain is just robotic brain but it's organic.
I would choose 1 and 0 so I could upload myself to any computer and even to bloodshadow, killsdazombies which would have robotic brain.