I'll list my top 3 choices. 1. I'd chose the Halo universe and I'd enlist as a Marine in the UNSC. I'd drop in and enlist about 2 years before the Covernant-Human war so that I'll be a boot but at least done with my training. 2. I'd drop in in the Warhammer world somewhere in the Empire, maybe in Altdorf or Nuln as my self and I'd either enlist as a City-guardsman of as a Wizard at the Collage of Magic. When? I don't know. 3. And thirdly I'd drop in in the Avatar universe as a Water or Earth bender because cool. :)