I spent 10 years in the RV business, so I'll try to help.
Despite their aircraft styling, Airstreams are brutally heavy and difficult to work on. I call them Airscreams 'cuz that's what you do when you have to fix 'em. Parts are expensive, too. So you need a pretty serious tow vehicle and a fat wallet if you go that route.
Folding and pop-up trailers are great because they're light and low. You can pull them with almost anything, and you don't have the frontal area to pull through the wind. If you're looking at one of these, pay attention to the hardware and/or mechanism used to make it fold. Some designs are very poor, prone to failure and aggravating to use.
If you're tall, sleeping in any trailer can be difficult. Make sure you fit the bed and you're comfortable. Ceiling height can also be an issue and leave Tommy Boy marks on your forehead.
A common mistake people make, is failing to account for the total weight when loaded. Whatever choice you make, be sure your tow vehicle can safely handle the combined weight. You never want a trailer to call the shots and drive you.