I have personal. I don't sell products so I don't think I'll ever need a premier or business account..
Yes, you can switch back to a personal acc from a premier account, although only once. Also you can open 2 paypal accounts, one personal and one premier. (Better idea than to downgrade a premier acc as it can be used to recieve credit card payments) Al
So what is the big deal between the types of a/c's ? I have a verified Business Account Type. Not that I make any great money via paypal.