Oh, good question.
After thinking for more than an hour on this, I am still struggling. LOL You know, I am very comfortable in my own skin so choosing another being that I would want to “be”, even if only for a short amount of time, is rather hard. 🙂
Hm, if I could choose to be anyone at all, regardless of height, weight or anything, maybe Sora from “No Game no Life” (Anybody else wann be my Shiro?). 🙂 I like his persona and his immense knowledge of psychological ways to influence people – and his gaming skills are from out of this world. 🙂 For him I would not have to change much on my appearance.
Otherwise I have a soft spot for white hair, so maybe Mael from “Seven Deadly Sins” or Sephiroth from “Final Fantasy VII”. Ooooor Zhongli from “Genshin Impact”. Hah, too many great guys to choose from.
If I could choose one from my own gender, maybe Hanako from the video game “Persona 4 Golden”. She is awesome. Whenever I stumble across her, I am so sad that she is not a social link. I love how full of confidence she is. 🙂 (Funny, she was the first one to come to my mind, even before I could think of any male characters)