My sister seems to be doing this, she works at Disney about a third of the year doing the Disney collage program-- shes gone 5 times now, spends another 1/4th of the year as a camp consular. She takes some classes here and there at community collage and lives at home when shes not at Disney or camp. She has no desire to more out/ own a home/ get married it seems. I'm glad shes happy, but I do wish she'd grow up sometimes :/
I moved out the second I could, am already married and expecting my 1st child.( I'm 27, shes 26) She might be happier then I am tho so its definitely worth looking into. She goes out and travels with friends. My husband and I also get to travel but he is my only friend which is sometimes really hard.
I do also worry about the future as far as helping our mom and grandparents with old age.