What kind of tourist are you? Do you follow a strict plan, with no room for spontaneity, or show up ready for anything? Do you try to get a good feel for a place, or spend your whole trip in an alcohol induced buzz?
Do you really take the time to look around you, to learn the language, try to get to know a few of the locals? Do you ask people what there is to see and do and find nice things to say about where they live? Or, since you are spending a lot of your hard earned money, do you demand the best of everything and complain if you don't get it? If things are better at home, are you sure to make your hosts aware of this?
Do you seek out the McDonalds or do you try to find restaurants off the beaten path that cater to the locals? Are you there for photo ops or enrichment?
When you have to leave, are you a better person for the experience? Is the place you visited slightly better thanks to your visit?
Heaven is home. Here on earth, we're tourists.