A. Can't Hurt To Try It. Unless We're Talking Sword Juggling. Or Spam.
A. Chili. I traveled for a year after college to 42 countries all on my own and on the very cheap (and it was amazing). The two continents I didn't get to were South America and Antarctica. So if I were in Chili right now, I'd have my feet on South American soil, while I tried to hitch a boat ride to Antarctica.
A. My great-grandmother.
A. The ability to play the guitar. And sing on key. Possibly in Italian.
A. Good friends and family at a bonfire on the beach (which must include s'mores), someone strumming a guitar, and a meteor shower in the sky. Forgetting the logistics of electrical outlets in the sand, if there could miraculously be a hot tub there, that would pretty much be heaven.