If reincarnation is a "thing", and you had a choice - who would you be in your next life? Me - a cross between Danica Patrick and Lizzy Hale! \m/
I would like to come back as myself, knowing what I have learned in this life, and then going on to learn more in the new life. I think it would be impossible to be a baby with the thoughts of an adult but perhaps all the things previously learned coming to mind in the early adult years.
This is a topic discussed in some religious circles about the young Jesus and what he may or may not have known about his alleged previous existence in heaven.
I would want to return to be a space traveler. Explore all that awesome universe of which I am a part. Oh well, from star dust am I made and to star I will return so at least my atoms in some form or another will be floating around.
As for being someone different I guess I am ego centric, I like me.