Honestly, I don't quest ever... Having to look at my machine to GRIND in general is not worth my time.

I instanced every level from 1-64
5x chars, 1x paladin, 1x druid, 3x shaman.
All bosses in both wings of hellfire are easy to deal with if you know how.

Every boss so far has his or her niche tricks.
I find it effortless and easy to be able to login and just start instancing, almost effortless, good loot.
Not so bad really..