DLC with the game is just added value tbh. My real objective is to give the modding community a substantial headstart on fixing bugs, gameplay issues, making combat amazing, and optimizing the game way beyond what Bethesda ever could.
When I fight a dragon in Skyrim, I want it to be beyond epic. I want to climb to the top of a tower, jump onto it while it's flying mid-air and take it down a la Shadow of the Colossus. I want to swim in a river and actually see wildlife, or at least SOMETHING other than slaughterfish. I want to walk into an ambush, that pushes me to think strategically and when I'm about to be overwhelmed, the NPC that I had recruited on my team shows up out of nowhere and helps me turn the tide of battle (happened to me in Fallout 3, I was wandering through sewers only to be ambushed by a horrific number of feral ghouls).
The only way to get experiences like this is by modding/creating a game yourself or waiting for other gamers to do it. The modding community did not disappoint me in Oblivion or Fallout 3. I trust they will not disappoint for Skyrim either.