I have been recently addicted to playing L4D2.
Half Life is one of my favorite series mostly due to the first game and Opposing Force being really really good games, the second game is quite good but it works better as a tech demo. My favorite character in the franchise is Gordon's brother John who only appears during the chapter Urban Flight in Episode 1, I hope he appears in HL3. I used to map for it when I was a kid but all of my maps were lost to hard drive copying gone wrong and computers failing completely. I'll try and dig up some of the more "recent" maps and post images of them here later.
Number Of Mods Canned : 7
Doom, doom, doom. I really don't play Doom as much as my friends do but I like playing it when I do play Doom. The biggest reason I don't play doom is because all source ports have terrible default settings and their settings menus are abysmal. The most popular source port of Doom, GZDoom has some of the WORST default settings I've ever seen on ANYTHING with as large of a stranglehold on both doom development and indie game development as GZDoom has. It STILL has problems running some of the most interesting mods such as Lilith, and other sourceports come with their own drawbacks. I have made a few maps for Doom which most of them haven't gone anywhere. Once things settle down in my life I'll probably relearn the tools, same with hammer. My favorite mods for doom are MyHouse.wad, Hideous Destructor, FartyGuns and The Golden Souls 2.
Number Of Mods Canned : 3