Being outdoors is a lot of it. If you are an outdoors person, hiking, fishing, walking, or just sitting outside enjoying nature, then you will have that feeling about going camping.
If you are more of an indoor person you may enjoy camping when you go, but not get as excited about it as some others do.
It is relaxing to get away from home, work, phones, tv's, computers, interestates, etc... There are times we do nothing more than sit around the campsite for a couple of hours just talking, kids playing, whatever. Thats the great thing about camping, there is no schedules, or we have to do this or that. But for those who like to be doing something all the time, you can play games, hike, hit the swimming hole, ride bikes, walk around the campground and visit other campers....