...what would it be?

The "catch:" You still have to keep your current life. You still have kids, SO has the same career he/she does now, live in the same place...etc...

I think I'd like to be a mail carrier. Sounds silly, but the hours are great, all holidays off, good benefits, etc. We live in a very temperate climate and today, there is not a cloud in the sky. The mail carrier came in shorts and a t-shirt! And what an easy way to get exercise and stay fit! I'd love to spend all day outdoors!