My ratings of episodes has changed (considerably from season 10 on), but I figured I'd put an historical archive of what I had for them before...
A+= 10 or 9.5; A = 9;A- = 8.5; B+ = 8; B = 7.5;B- = 7; C+= 6.5; C = 6;C- = 5.5; D+ = 5; D = 4.5;D- = 4; F =below 4
"Beyond Blunderdome" - 8.5
"Brother's Little Helper" - 8.5
"Guess Who's Coming to Criticize Dinner?" - 8.5
"Treehouse of Horror X" - 9
"E-I-E-I-(Annoyed Grunt)" - 9
"Hello Gutter, Hello Fadder" - 8.5
"Eight Misbehavin'" - 7.5
"Take My Wife, Sleaze" - 7.5
"Grift of the Magi" - 8.5
"Little Big Mom" - 9
"Faith Off" - 8
"The Mansion Family" - 8
"Saddlesore Galactica" - 8
"Alone Again, Natura-Diddily" - 9
"Missionary: Impossible" - 8.5
"Pygmoelian" - 8.5
"Bart to the Future" - 7.5
"Days of Wine and D'oh'ses" - 8
"Kill the Alligator and Run" - 7.5
"Last Tap Dance in Springfield" - 9
"It's a Mad, Mad, Mad, Mad Marge" - 6.5
"Behind the Laughter" - 9