Finished Borderlands 1 and I'm well into BL2. I wanted to do the DLC but I just couldn't be arsed. DLC has a certain minimum level and that was way above my current level after finishing the game. To do the DLC I'd have to play through half of another playthrough to get there. They should just give you the power to set the difficulty level on your own. Who cares if I'm overleveled? I just want to play the story.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.