I dislike DLC. I'd rather get a bigger, deeper game that stands on its own. That said if It's offered I prefer large well developed DLC. A great example of this is Old World Blues. In fact I found every New Vegas DLC worth it though I still would rather see less DLC with more content.
An example of terrible DLC is the DLC for Gearbox's Borderlands 2. It's a ton of little dinky mostly worthless items that if offered for a fair price all in one would have been OK but with each piece being a couple bucks it makes it a ripoff.
Btw there really should have been the option to pick 'non-bin