I kinda think it would be okay if we had persocoms, but I'd prefer them to be kinda how like Data was in the Star Trek: The Next Generation. Here's some basic info about Data to get what I mean.
Data is an android like Chii was, one of a kind, and could actually think and reason on his own, but he didn't have the ability to express emotions. He was not cold personality wise, he was very helpful and curious about things instead.
A persocom that was like that, who looked like a normal person (I'd have a girl-one obviously) and acted a lot like a normal person, but you could still tell was an android in how they talked, is what I'd want. What I'm meaning is that they'd be in a sort of midway point between how the normal persocoms on Chobits acted and how Chii acted. That's the area that I place Data from ST:TNG in.
Of course, if we did eventually create persocoms, something that might just happen during my lifetime (I'm 23 years old), we'd of course have to spend an exhaustive amount of time on the real moral and ethics issues that their creation would open up and work through those diligently first, with no rushing.
My own persocom, I'd use as an assistant to help me stay on task at home with whatever I'm doing and to remind me of what I'd planned to do during the day, as I get very, very easily sidetracked and distracted when doing leisure-related activities. I'd prefer it to act as a companion, but to remind me that it is a machine first and foremost if I started to get attached to it, and it would in that regard mostly serve to steer me toward finding a real girl to have a serious relationship with. I'd also in that regard, purposely have it look unattractive (not ugly, just rather bland) to help keep myself from getting attached romantically to it.