An interesting question was posed recently on Twitter to Ion Hazzikostas: is there going to be a dungeon blacklist option, like there is with PvP battlegrounds?
For those unaware -- when you queue up for a random PvP battleground you can pick two battlegrounds that you don't want to do. The system honors those blacklist selections and you won't be placed in those matches. This is very useful for days when you constantly get Arathi Basin (like I do all the time).
The idea of applying this to dungeons is interesting, and one that I think has some merit to it. When running dungeons there's always a few that no one likes to do, or at least that's the perceived opinion. I'm thinking of things like Heroic Deadmines. There were points in there that were a virtually guaranteed wipe in a PuG. And this expansion I'm not a fan of the Stormstout Brewery... it can just be so long at points, with someone always getting stuck behind the doors for the big bad rabbit of carrot death.