I don't really like boosting either BubblePop, but I don't want to get shafted like on Halo Reach where I bought the DLC, never really played it when there was a DLC playlist and then never have the opportunity to get the achievements after they remove said playlist. Getting in a lobby with people with DLC is rare enough, let alone getting everyone to vote for the map you need.
The achievement "You Blew It Up" for example, is probably one that I will never get because of this.
(This bring a back up the old, "Either always have a DLC playlist or don't have DLC achievements" discussion.)