I've been interested in cryptography since I was little. I recently found out about and joined the American Cryptogram Association, which publishes a journal devoted to developing and solving manual ciphers. They had a convention at the end of August that I went to for a bit. The morning had talks about how to attack certain cipher types, and the afternoon had a solving contest. You had an hour and a half to solve a dozen ciphers of different kinds. I was able to solve five of them in the given time, which was good enough for me to win first place is the novice division (containing those who had been a member of the ACA for fewer than five years).
There are a few more that I know how to solve, I just ran out of time. And a few others that I have never worked with. But it's my goal to finish all of them soon.
If there's interest, I can share some of the ciphers and give a brief description of them if you want to try your hand at solving some.