I liked the last Buffy overall. Angel..not as much, but just because I was a bit irked by some stuff that happened leading up to..plus the characters that died. Least one of them anyway..really ticked me off.
I've been trying to think of ones that were really good...A lot of the ones I remember have just been kind of....blah and way over hyped.
I did like the finale of Friends. I felt it tied up things well..though I was close to be ticked off when I first watched it.
Ummm....hmmm.
The last ER was ok - I can't remember if you have that one or not. Some parts were really good, but again, there were things that I didn't like.
Like has been mentioned, the finale for M.A.S.H. is great.
Hmmm.....can't think of any others at the moment.