I sleep in a hammock... Basically one of these https://www.amazon.com/Hammock-Sky-Brazilian-Double-Backyard... with a stand like this https://www.amazon.com/Best-ChoiceProducts-Hammock-Portable-... It's worked out for me for the last few years. Previously I slept on a cot, before that it was an air mattress / floor when I was too lazy to reinflate the mattress, and a regular double-size mattress or a couch before then. Occasionally I'll travel to San Francisco or Vancouver for work and haven't slept on anything amazing, in fact it sometimes takes me some time to get used to sleeping on a bed again since I'd rather have my hammock.

If you have a SO though I've no data on how well it would work out. :'(