So, I very recently finished watching this series for the first time and I adored it. I loved the way they ended it. I'm glad Jeff and Annie got a signifivant moment together before the series ended.
My only question is, why does everyone hate season 4 so much? Before watching it I was warned that Season 4 was poor, but told to watch through it because it picks up again in seasons 5 and 6. However, after watching, I can confidently rank the seasons from best to worst: 3,2,1,4,5,6.
This is of course just my opinion, but I really had to fight through season 6 without falling asleep; the only reason I kept watching was because I wanted to find out what happened between Jeff and Annie after the little "teaser" at the end of Season 5, and I found that the lack of Pierce really hurt the later seasons. Same goes for Troy and Shirley. I really disliked Buzz's rushed character introduction and development in season 5. The same thing happened in season 6 with Elroy, though I liked Elroy a lot more. Season 6 also introduced my least favourite character of the series - Frankie.