It's a toss up for me.
I'd like to be able to get a whim to travel half way around the world at a moment's notice without prior notice to my employer, have my job waiting when I get back. Be at my destination within an hour with no concern for funds, hotel reservations and long lines at the airport. AND have everyone in the other country speak perfect English.
My second choice would be to never age. Marlena and Kate are older than I am, their kids and grandkids keep aging but they haven't aged a bit.