Challenges. Have found a lot of them. Almost 40 in the state of Washington and almost 10 in Oregon.
In my profile I consider my 2 own challenges completed, but I have not logged a find. My sense based on Washington cachers general opinion, that I would be lambasted for logging a find on my own challenge....course, some folks do use sock puppets to get around that. However, I will not a log a find on my challenges though sometimes I wish I could. Moun10Bike has not logged a find on his Washington Delorme Challenge either, nor has Lizzy on her Washington State County Challenge.
I find many people love the idea of challenge caches, even if there are some out there you will never get. I will never do the Forest Fire Lookout one or some other ones, but thats okay. Ignore them if you do not want to be bothered by them, many folks like challenges.
There are some challenges I do not consider well made, but its not for me to decide whats a challenge. I have a set of rules in my head of what a challenge is (vs say a series) but I imagine it would be difficult to come up with a set of guidelines of what a challenge is.
As far as souvenirs and challenges go. I like the idea in theory, but the problem with souvenirs....they cant be deleted. What if someone claimed a find on a challenge or any cache but the find got deleted? The souvenir would still be there. I imagine souvenirs will be flushed out more as time goes by.
So, I love challenges.