I think it must appeal to some deep basic instinct inside. I enjoy sitting at home on my computer and figuring out which caches I am going to do the next day. Reading all the logs and looking for the extra little clues as to how to find it. I tend to pick ones with nice walks in nice areas so I actually enjoy the adventure. Then topping it with the self satisfaction when I find the cache. My teenage son says I am mad and there is absolutely no logic in it. However, I think if I just got him out to find one with me he would be just as hooked!