This description of tank roulette made me laugh:

I’ve heard all about “Tank Roulette”: a game in which the tank stands at the edge of Krasus’s Landing, queues using the Dungeon Finder as a Tank, jumps off the edge and either:

* (a) ends up safely in a dungeon before they die a horrible death from falling.

* (b) or – there’s a small chance – that they might hit the ground before they are matched with a party.

via Hots and Dots Absolute Power.

I’ve had a lot of fun running PUGs as a tank.  Unfortunately I got tired of it just as my death knight got his Northrend Dungeon Hero achievement.  I still haven’t run Pit of Saron with him.

Insanely enough, I’ve been running the regular Northrend dungeons on my shaman as a healer.  I do NOT sign up as party lead with him.  All I care about is making the green bars go right.  If I feel enthusiastic, I may occasionally throw in a flame shock or a fire elemental.  It’s an interesting change from tanking and I look forward to getting him ready for heroics.