Personally, I'm more like that first type. I quest hard until top level, then take a break from it while I work on other things. I quested through Storm Peaks in the Wrath beta, but I haven't done it on live yet. I hit level 80 in Icecrown and haven't done much questing since then, I've mostly been running raids and heroics, finally replacing my level 70 gear. My first goal, though? I wanted the Reins of the Red Drake.