I sleepwalk if I am sleeping somewhere apart from my own bed. Which made sleeping at a girlfriend's house or in a hotel quite an adventure.
My friend had that problem. He used to wake up and walk around the house and even mess up with things . But he's better now. And... I don't have such a problem.
My daughter sleep talks too. Earlier it was more but as she is growing, its frequency is getting less. But I have a problem but little different. I am suffering from primary generalised epilepsy. For this reason, I always need to sleep in the afternoon for at least 1 or 2 hours. And when I am in deep sleep and suddenly someone disturbs me (like a cellphone call), I have a very hard time and even worse when I am supposed to go out on my scooter. For e.g. y'day my wife gave a call at 2:45 pm to come and collect her from the bus stop. At that time I was in a very deep sleep when she called me. For few seconds I just could not understand that which button to press on the mobile phone. But anyways I went to collect her on my scooter and guys you won't believe, I was still half asleep that time. Just wanted to reach home and sleep.
I think there is nothing wrong with having a nap at afternoon. My parents and I had the same habit. But not now, got three little bundle of joys at my hand. They are always doing something. I am very alert all the time so they could not harm themselves. You must be careful driving your scooter and half sleeping. It could harm you.