Not just a real good dream, but like any dream. Like a dream so strange and surreal you wanted to stay a bit longer to see what happened. You don't need to say the whole dream if you don't want too or don't feel comfortable. I think the kind of dreams people don't wanna wake up from can really make people think and others understand what that person is like.
One of the dreams I had that I didn't wanna wake up from was a flying dream (quite popular from what I hear). I was a dragon and could fly wherever I wanted. Just felt fantastic to fly, but also kinda strange because I'm terrified of flying and heights, but still felt awesome to be able to fly freely.