Geocaching is fun. It is even more fun when done with a friend or two or ten.
My first caching buddies were Fossilhunter and Mc5. Now I mostly cache with Species5618. In order to log this cache you must geocache with others. Please list the geocaching.com usernames of 30 people you have found (or DNF'd) geocaches with. This does not include people who you have only met at geocaching events. If you left an event with some other cachers and went together to find a geocache, those people will count. If you met another cacher at ground zero after you or they had already found the cache, chatted, then you parted ways, that wouldn't count. However, if you met another cacher at ground zero and you searched together to find or DNF the cache together, that would count. For families that share one caching name, you may only claim the name once. But, if you have ever been fortunate enough to cache with Species5618 and myself, together, you can claim all three of our caching names. 
If you have OCD (obsessed cacher disorder) you may list the name and GC numbers of one cache you found with each name. Although, this is NOT a requirement. I still want you to love me. 
The difficulty rating is mostly based on the challenge aspect of the cache.