I played both games and i can say say that Fallout 3 has way more superior DLC content in comparison to Fallout New Vegas. I found the Fallout 3 DLC missions to be fun, entertaining and useful. New Vegas DLC missions were annoying and irratating. Only DLC map i really liked was The Divided. Honest Hearts was so so, Dead Money and Old World Blues were so annoying play, i never bothered with them when i played New Vegas again.