Running dailies every day on my rogue trying to raise money for an epic flying mount eventually sapped my will to live.

Compound the repetiive grind of dailies with repetitive Kara runs week in and week out for 2 or 3 nights a week, Gruuls 1 night and then a little bit of excitement with either VR attempts or Mag attempts. Although clearing the trash to VR in heroics/Kara gear is much like sticking pins in your eyes after the novelty wears off.

Beware of the daily quest burnout.