Like the title. What games are made better with mods, and foster a great modding scene that retains momentum and delivers excellent content?
My personal favorite is Fallout: New Vegas, but games like DOOM, Half-Life 2 (really all source engine games), and Minecraft have extremely unique mod scenes. Of course, Skyrim remains a modding titan. STALKER: Anomaly is already an amazing mod project and has mod lists for it like GAMMA.
What are your favorites?
I came here to post Morrowind but it's already been mentioned so I'll give a shout out to ARMA 3. I don't think anyone even plays that game without mods.
I did at first then I modded it later after I exhausted all the single player stuff