I love modding scenes but I don't do a whole lot of it myself. Some games like Left 4 Dead 2 I can mod with textures, maps, and sound changes. I haven't even begun to learn modding via LUA code or any other kind of code other than rudimentary texture material data, though.

I always try to respect the effort and time many modders spend putting into the mods they share with the community. It's an awesome thing that often gets taken for granted.