This is a complete ME thing.
I don't play for the Efficiency of getting it over with as fast as possible That go go go mentality has bothered me even in WOW. I play the game for the enjoyment of the zones. The feel for the class. the boss fights. The music. The spamming of AOE abilities is really really boring to me. If I want good gear I go raid and attempt to do harder content than dungeons. The roulette's have been nothing more than something to pass the time with as gearing up through dungeons was never a issue or priority with me. The tombstones drop from all sorts of content and the rate of which I get them was never truly and issue for me.
Take Antitower zone for example. I will always take my time there because it is my absolute most favorite zone. The music gets me every time and the zone setting on your way to the castle is stunning.
I guess someone at my age the difference between 10-20 minutes is really negligible time to me. My play time is 1030 pm - 2am most week nights. Give or take 20 minutes doesn't mean much to me.