Dunno, I’ve been seeing lots of SMOrc DHs lately.
On the other hand, nothing suprising: those luckards with rank obsession tend to prefer the most skill-intensive 
, as self-annointed pundits often put it, decks, i.e. with the highest potential for displaying true skill, such as: Clowniana Druid, skill Rogue, different forms of Shaman and so on, to name a few recent examples. Obviously, a very skill-testing hero power, combined with a set of very well balanced cards (from the eternal Shadowstep and Preparation to the more recent Nightmare Fuel or Deja Vu… speaking of which, a ‘Discover’ effect with a huge trolling — or ‘whiffing’, depending on, ahem, ‘skill’ — potential — very skill-testing, again, just like all random effects), makes for a natural next candidate.
PS Also add Discover Huntard to the list as a notable example. ‘Huntard not stupid! Huntard fine!’