i'd probably want to be Padme, even if her world goes kinda wrong...shes beautiful, intelligent, strong, determined and is a very powerful person in the galaxy [at that time]...also because she has jedi friends like obi-wan and of course anakin...plus she gets to wear really really cool clothes and live on a really nice planet.
I would want to be Exar Kun, like Celsius. He kicks ass with the Dark-Side!
But on a 'light'er note ( 😉 ), I would Odan-Urr, the oldest living Jedi Master. He lived to be 1000 years old before Exar Kun put an end to his life, and he was extremely wise. Yoda would be my second choice, for he also had the wisdom of 900 years of being a Jedi.