Season rankings:
1) Season 3 - The most consistent and consistently great season in my opinion. The show at its peak in basically every department. Introduces Faith, The Mayor and Anya to an already stacked cast of favourites, and a bunch of memorable episodes.
2) Season 5 - Not a perfect run but really good. The Body is a harrowing experience, still incredible in my book. This season really felt like Buffy's greatest challenge yet, and though Dawn wasn't always fun to be around, the sister dynamic really worked and changed the stakes. Glory was a great villain, just the right amount of quirk to the mystery and lore.
3.) Season 2 - This was tough to place here because I think the Angelus arc in the back half of the season is perhaps the show at its very best. The irony is not lost on me that Joss Whedon's feminist show seems to be
really good at making Angel the most loathsome 'bad boyfriend' ever. Season 2 also has its share of rough spots though, more than the seasons above.
4.) Season 7 - Kinda surprised it's this high but I think I like Season 7 more than the average. It's a solid send-off season that gets a bit confused but sticks the landing pretty well. A mid-tier season, not frequently remarkable but also never awful.
5.) Season 1 - Super corny but the cast are charming and their friendship eases a lot of growing pains.
6.) Season 4 - It feels really harsh to put a season with 'Hush', 'A New Man' and 'Restless' this far down but that is season 4 for you. Really struggles to find its feet with new locations and a rotating cast. There are quite a few great episodes here, in a rudderless story that bet the farm on the Initiative and lost. Adam in particular is an uncharacteristically bland villain.
7.) Season 6 - This is the easiest to place for me. I don't like season 6. The musical is really well put together, and I think a handful of episodes are pretty good, but the season is mostly 'off' to outright bad. A miserable experience, normally intentional, sometimes unintentional; but always miserable.
That it does. Hopefully one day. If physical releases are going to survive at all I could see them shifting more toward collector markets. This might generate some more boxsets and varied releases.
Either that, or perhaps some nerd will crate definitive HD versions themselves at some point. Saying that with repesct to nerds and a fear that it'll be me doing that project somewhen.