Nobody and lots of people. Maybe Weird Al. I really enjoy his music and have since childhood. I also appreciate John Williams music. I think he is a great composer and a lot of his music is underappreciated as it's mostly movie soundtrack. A lot of it stands on its own.
I don't know. Whenever I meet or see famous people I'm never really excited or intimidated. They are just people like most everyone else. They may be REALLY good at something, or better looking, or whatever, but they have their own flaws as well.
But probably I'd want to go back in time and meet the @55hole who stole my tackle box one night while we were camping. I had a decent amount of $$$ invested in that crap, but what really gets me is the stuff that my dad passed down to me, or bought me when I was a kid. Sometimes the best part about fishing was rummaging through that thing and seeing lures and reels that reminded me of fishing trips with him.
Oh hell, this isn't so hard. I'd go back to see my Grandma and give her a hug and tell her I love her before she passed away.