The Mothership Man, waterbeds were the shit back in the day. Unless you ever wanted to have sex in one, or the plug got unplugged and it lost its heat. In either case your best option was to take a blanket to the couch.
CIWB I grew up sleeping on a waterbed, and I miss it. I play with the idea of buying one every now and then, but there hard to find and I'm lazy.
The Mothership Oh I grew up on one too, but had to make the switch out when I moved away to college. After that it was all futon, cause that's what 90s chicks were into.