Mine would be infinite stimulations. I'd have one where I'd just think and whatever I need would be there. I'd have one where I'd go on adventures kinda like realistic minecraft. One with just picturesque landscapes where I'd go diving swim with dolphins fish hike go cliff diving. I'd have a simulation where I could live on earth but I could shape it how I want. One where it is actually like real life and I can't have any special powers. Maybe a world like under tail or something. Possibly one where everyone has different superpowers or you could pass through different tv shows as a background/main character. there's so many I don't think I could fit them all in.
If you're non religious (like me) have answer it as if you would be omnipotent