Honestly I'm never much for the going to another world, I think our world is fine and has a lot of potential. I do would love a world with magic tho. Ideally also vampires but if I have magic I probably can cook up my own vamps. To that end would then be the question what world/magic system and there I must probably exclude my own book because of course, I love my own magic system the most (it lowkey has vampires too). I think I wouldn't go for one of the videogame-y worlds that anime likes a lot, leveling up skill trees feels very limited. I want something with more wild magic, where the world feels like magic is just another force of nature that could occasionally fuck up your town. Thinking about it the probably best fit would mayhaps be the Winx universe. There the world really is infused with magic and magic operates on magical girl rules of "the more you want it and the more friends you have the more powerful you can be" and I'm a popular extrovert with a stupidly thick head, I could probably be a protagonist over there.

And I can arrange myself with being a fairy, not the worst type of flight magic for sure. So I arrive at "Winx Club" universe.