Re: I want Data back...
B-4 was no more "empty-headed" than a developmentally disabled human. You wouldn't say such a human's personality didn't exist or didn't deserve to exist, or that it would be okay to overwrite it with a smarter person's brain.
Well, unless you're Julian Bashir's parents...
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner