I've only been caching since Dec. 26, 2004, and my favorite caches are ammo boxes in the woods. I, too, enjoy the walks and/or hikes, but now that it is snake season in Alabama, I find I like micros or small caches better because there is less chance of encountering snakes, spiders, poison ivy. . . you get the picture. Another reason I like caches that don't take too long to find is because of time constraints from work. Now, just because a cache is a micro doesn't mean that for ME it will take less time because I am blind to most micros. I post many DNFs for micro caches that most cachers walk right up to and find instantly!
Overall, I just like caching.