As someone who was in the modding community here when it first started, I'm amazed with both how far things have come, and how vibrant it still is. Also, many of the aspects of modding KOTOR are simpler than some of the games today. As someone who has done a lot of texture mods for KOTOR and TSL, and now working with Skyrim, KOTOR os much easier. It really is a good stepping stone for getting familiar with modding in general.
Plus, the KOTOR is an awesome game that a lot of people still play.