I've got to say a Camp Half Blood roleplay which was not formally named and is now lost due to guildfall. It was a roleplay where I got to play a son of Hermes called Daniel Washington. The guy was one of those loner jerks but not without reason (read: his best friend got killed saving his girlfriend and he blames the girlfriend on it completely and developed a hatred towards all of the specific god's family for it). He was the underdog however as he not only was the leader (picked at the last second) but he led both a daughter of zeus (whom he dated during the quest towards the end) but also a son of Poseidon (he saved his ass single handedly after being captured) The character also had a knack for on the spot tactical planning, and sword fighting as well as a hobby for puzzles. There was also one other character but I think they dropped off and were killed (a lot of people left the rp before it ended). 

It was my first real rp where I had people who genuinely wanted to get to the end and I became the roleplayer I am today because of said roleplay. My favorite aspects being (Daniel aside as I don't want to turn this into a post praising the almighty gods of greece for this guy) that it could have died but stayed alive long enough for the people to have fun in it and to have some pretty fun action scenes even if they were dumb some of the times along with some deus ex machina and butt pulls.