Two weeks ago, I would have thought "Well gee, I sure like the world of pokemon, maybe that'd be cool. No wait, what if I made myself rich and gave myself a yacht and just traveled everywhere in the real world? What about Star Wars? I'd love to shoot something with a turbolaser! Or maybe give myself a portal gun! awwwww yeaaa!"
Well, I cannot say that's what came to my mind. There is only one world where happiness permeates everything. A world where everything lives in harmony. A world where you can sleep on clouds! A world where magic and friendship are the only things that matter! A magical land where ponies are everywhere!
I'd be a pegasus in Equestria. I would need nothing else. Ever.