I absolutely LOVE creator. No minifigs, no overly specialized pieces, nothing licensed. Just you and the basic bricks building anything you want. I'd say "it makes me feel like a child again" but when I was young the only thing I cared about was hoarding as many clone troopers as possible. So, this is a nice new experience for me in all honesty.
A while ago I picked up the Mythical Creatures set and it was a very cathartic experience using the limited parts to build whatever.
Here's two things I built below- my attempts at a plesiosaurus and a rancor