In your opinion, how difficult should heroic dungeons be? Should they be extremely easy as in 3.0.1 / HoT? Or perhaps B.C. difficult? 4.0.3 / 4.1.0? Or hit the middle with the 3.3 dungeons?
Personally I loved the 3.3 dungeons. They were challenging enough to provide a fun experience and you actually had to pay attention to the mechanics, but weren't balls-to-the-wall like in B.C.