Something that's sort of unique to Star Trek TNG is the presence of mini-arcs that will have one or two usually non-consecutive episodes per season. In a way TNG is a show comprised predominantly of mini-arcs, as opposed to being a serial with one overarching arc.
The Q Episodes
The Borg Episodes
Worf/Klingon arc with his dad, brother, and son
Lt. Barclay episodes
It's kind of cool to watch all of them back to back with Netflix, you can make little miniseries for yourself. They are all interlinked too, you need to watch them in order.