It seems to me that I can get most any look and feel I want. Most of the ones other people post seem to have a very different look and feel to my own.

That said, you can sort of get a default look and feel if you just give a short prompt, and then it will tend toward the ones that are favored by RLHF. I prefer very long prompts.... as long as it will allow.

So if you do "a cool treehouse" you'll get sort of the default look. It will be very different if you say "treehouse, naturally occurring, in an old beautiful tree with branches that are low and spread widely and have lots of character and hanging moss and thick bark and curvy roots and mushrooms on a rocky outcropping from a mountainside. photograph, golden hour, sun through trees, damp from rain. Treehouse is part of tree, with fractal forms and live shaped wood and stone and stained glass and glowiness. art nouveau, gorgeous colors and fantasy design"

It's funny that the same people who complain that AI is "cheating" and uncreative, often are the ones who go to so little effort to get good results. It's not like it takes any arcane knowledge to get good images, but if you can use some imagination and string a lot of descriptive words together you can get so much better results.