I enjoyed watching Jon and the free folk wander back into the forest of the North. It was a nice ending, but still confusing AF by the end of it. WTF just happened? All the lore, mystery and build-up about Jon Snow being a Targaryan, dying, coming back to life, prophecy etc. then ends up basically just wandering off to be the new hippy king North of the wall.
I don't think the rushed plot and awkward scenes of the last episode spoil the lot though. Best show of all time IMO, I actually really enjoyed all of the other episodes, just the last one was a let down somewhat. They really drained the show of its mystery and I don't really like how they felt like they had to tie off all of the storylines like that.
There have been tales of spinoffs since they announced the finale, so hopefully those are done justice. If HBO money stays involved I'm sure they will.