BorderLands - Xbox360 = All of the DLC - Oh god they were all a waste. Mainly because due to my being late to the party after months of not playing it, not alot of people play online anymore and the ones you do find mostly are using glitches.
Left 4 Dead 2 - Xbox360 = The passing DLC - Bought this together with two friends, and this was so not worth the price due to how short and boring it was. I was expecting a little more content especially due to the fact that there would be interactions with the original L4D 1 survivors but nope it was just a wam bam thank you m'am kind of deal which was disappointing...
Mass Effect 2 -Xbox360 = Kasumi and Vehicle DLC - I purchased the Kasumi DLC and will save the other DLCs for later perhaps for when the next DLC comes out, but from what I played of the Kasumi DLC. It wasn't too bad, a little short and simple but hey for the type of game Mass Effect 2 is any new Side Mission DLC is expected to be that way.
Dragon age Origins -Xbox360 - Awakening DLC - Is no longer interested in this until Dragon Age 2 draws close to it's release....