I would actually really like to see more caches with lengthy log books. I'm extremely new to geocaching and all of the caches in my area have small logs in them (or just a piece of paper for the micros) that aren't really viable for writing little notes on. I've stopped by a few on my trips back and forth that were easy park/grabs just to get a good idea of what to expect and learn the game, but what I really have loved are the ones that take me on a hike through some beautiful forest or to an interesting historical area that I wouldn't have gone to otherwise (with a nice view is a bonus!). I made a day of it with my dad who was visiting and even he had a blast going through the areas, reading the history, and finding the caches to see who had last visited them. It would have been even more fun to see something extra creative inside of them which would have kept us in the area a little longer before hiking out. I should go back in my logs and write down more thoughts online for the particularly lengthy visits in retrospect, since I tend to log them right there on my phone so I don't forget.
Some of the park and grabs are pretty cleverly hidden, though, which I find impressive enough. If they take me to a nice park or area I'd like to visit again, or are cleverly hidden where I have to actually look a little and am impressed by after I don't mind that at all. I guess the experience of seeing beautiful places in an area I've lived my entire life for the first time is what feels nice to me, on top of the "treasure" hunt.
With the rise of video games, many people are into things for the points and achievements collections solely. I wouldn't say that's negative unless they cheat of course, because then you can't even be proud of your own achievement. As for competition, I think some people like to see the high numbers and be seen on leader boards, even if there is no specific competition going on with anyone else. I don't see that as a problem at all, as long as they aren't bothering anyone else with that goal.