If you don't like being tied down, perhaps a mortgage is too confining. An apartment in a bustling city puts you in the middle of the action, near plenty to do, sights to see as well as a big airport to get you where you want to go, stat!
Of course, you need lots of shelves for all your books. Sure, you can post snaps of your trips online or let your friends admire them on your smart phone.
Do your pics justice by printing the best, framing them beautifully, and arranging them artfully on the wall or propping on floating shelves amid exotic treasures brought back from faraway lands.