Yeah I gave up on the whole 'comprehensive experience' thing when it became clear very quickly that it was so subjective as to be an impossible task. I'm working my way through DS9 right now and will soon be watching Voyager as well before moving on to Enterprise.
With so much material out there and most of it quite good it really isn't possible to boil it down into some kind of essential list, as has been said. These lists now are more of a fan's guide to different episodes or story lines in the same vein as the Fan Collection sets.
I'm thinking I'm going to abandon this thread and move the viewing guide thing to its own thread to avoid confusion over the OP.