I like being alone, and if I had to share my truck with another person I would go insane. I have my stuff where I like it, I like to stop where I want, and I don't have to be nice to you if you aren't in my truck. Now if you can stand it, teams get better treatment. Were talking mainly drop and hooks, newer trucks, better loads. You can try it, if you don't like it you could always stop. If you go with a trainer it will be similar to team driving.
Hubby drives solo. We rode together for a year and had a great time but he wouldn't want to spend that much time being that confined with most other people. In fact, other than myself and our kids, there isn't anyone.
Personal stuff is one of my biggest problems. I carry alot of "stuff" on my truck. The fridge space is just enough for my stuff, no room for a 2nd person. The closet space is full of "my stuff", and I can't think of anything I would want to leave at home to accomodate another driver. And I don't wan to adjust the seat every time I get into it.
Oh, and I like the truck to be stationary when I am sleeping.