I didn't like the last episode. They simply won... AGAIN. Boring... same scenario as always, big bad guy, bid bad guy is indestructible, big bad guy loses. Giles was not at all intelligent in the whole series and I never liked the 'Willow being the most powerful Witch ever' nonsense- Buffy's friends should have stayed normal. A shame the last epiosde was a bit poor as a lot of the build-up was good.
I haven;t really liked any of the Buffy finales since series 2.
A lot of the most recent series of Angel was good too- as often with Angel seasons, it starts bad, ends dull, but has a good middle.