I'm a huge fan of speed dungeons. It feels so great to burn down so many enemies at once. I just give myself a little groan and neck crack IRL when I see I have to prepare myself for an overgeared tank to pull 1 pack at a time.

Shaving minutes off, and as you get more and more efficient shaving more minutes and seconds off the final product is great, rewarding and exhilarating for me. People who like slow dungeons sometimes try to be dense and say this is the equivalent of making the game a chore or "ummm I play for fun, you must not" in which case you just roll your eyes. At the end of the day I don't believe in pulling for a tank, so I feel a tank sets the pace of the dungeon and that's a risk you take by not queueing with a tank you know has a similarly mindset.