Some random thoughts...
Episodes that remain strong even after more rewatches than I can count: Who Watches The Watchers?, The Enemy, The Defector, Sarek, The Most Toys, Yesterday's Enterprise, The Offspring, Sins of the Father.
I never get bored during any of these.
Even though season 3 was the undeniable turning point for TNG, it still has some real stinkers. I'd forgotten how terrible The Price
was, and I never really cared for Transfigurations, The Ensigns of Command,
or Captain's Holiday.
(Not that the latter two are terrible, just not very good.)
And despite having some good stuff in them, there are some really forgettable eps such as Ménage à Troi, A Matter of Perspective,