RoS! Short but sweet. The group content really went by far too fast, but the raid content is pretty solid. Tier 3 gets kind of tedious, but Tier 2 is mostly fun (and 2.1/2.3 are great for parsing!)
Also... for an RoS image... I was looking through my pictures folder and for some reason I have this:
This is definitely related, in some way, to the Ring of Scale expansion, but I could not tell you why or how.