It makes me wonder how many people actually buy DLC? I have never bought DLC yet though am considering it for Civ 5. Am I alone in not buying DLC.

I don't mind if it adds levels, but they need to be good and at the right price. DLC often happens because they rushed the game in the first place though, and it's added revenue after the fact

I agree about adding different levels. That is one reason why on Civ 5 I am considering it. Though it also has the impact of duplicating expansion packs so they become less viable now. If people are buying DLC then they will not necessarily but a duplicating expansion pack, which could mean significantly few expansion packs sold.