Obviously, inspired by the "Favorites" Thread. Granted, there's not too many I don't like. In fact, I can only think of one episode that really doesn't have much redeeming value to it in my opinion...

Colonel Homer...the one where Homer manages Lurleen Lumpkin. I just didn't find much funny in this one. Interestingly enough, it was written by Groening.

Any and all of the "clip shows."

Clip shows and all of the Halloween episodes.

Normally I don't criticize the opinions of others, but you, sir, have lost your mind. No offense.

I don't like to criticize others' opinions either, but you're on the money here, Groucho.

In the last two seasons there have been some chuckle-free episodes. Of course my mind has erased all details of these experiences, so I don't know the episode titles...

"Homer the Moe" from this season where Homer takes over Moe's bar and REM has a pointless guest appearance. The only episode I've ever seen that was actually a chore to sit through.

From the last few season or so:

The one where they win a trip from an expired box of animal crackers and go to Africa.

Other (hopefully) forgettable episodes are

The one with the tennis players
The one with the Who where the town is split in half

And although I liked the idea of Bart and Milhouse taking over the Androids Dungeon, "Worst Episode Ever" features the unfunniest thing I've even seen: Comic Book Shop Guy dating Agnes Skinner. Double

Most from the first season but the one that sticks out the most in my mind that I absolutely hate is. . .

The one where the real Principal Skinner comes back home. I HAAAATEE this episode, I don't think there is one funny line in the whole thing.

Definitely "All Singing and Dancing" It sucks because it's a clip show and because it overuses the singing gag.

I can think of atleast one funny line.
"This is Armen's copy of Swank"
"Can I see your copy of Swank Armen?"
"Yes"
(homer flips intently through Armen's copy of Swank Magazine)

The one where Lisa was older and in college. Sucked big time.

The spinoff episode was pretty bad. From this season, there were a few bad ones, especially the cowboy episode from a few weeks ago. I'm also not a big fan of the period they went through 2 or 3 years ago, where every episode had to end up in a horrible musical number.

"Priciple and the Pauper"

That's the one where they find out that Skinner is really an impostor as the real Skinner comes back.

I didn't laugh once.

I'll second "All Singing All Dancing". There are two thing I don't care for with the Simpsons: Song numbers, and clip shows. Best of both worlds! Although I do like the Paint Your Wagon scene.

Oh man, I forgot about this one...just painful to watch. Good call.

Agreed

The tap dancing episode. I can't watch that one.

any lisa episode

Malibu Stacey/Lisa Lionheart
Lil' Lisa Slurry
the one where Lisa becomes a vegetarian
the one with Dustin Hoffman as the substitute
and many others
are all great, classic episodes and they are also "Lisa episodes".

The 2 that made me not watch the show anymore.
1st the one where the baseball players appeared. They show Jose Canseco running in to save a kid from a burning house.

2nd one Barry White singing at the end of the show. It didn't help the story, looks like it was put in just to have a star appear in this episode.

I got to agree with this. The last thing I want to see when watching a comedy show is a character who's perpetually depressed.

I thought the baseball one was hilarious, but the one with Barry White is one of my absolute favorites...that's the one about Whacking Day, our sacred snake skull-cracking day...

On the baseball one, the players went on strike in real life around then. So that episode of showing them as loveable heros turned me off.

The one where they go on the train with the hobo... probably the sickest and stupidest episode ever with that whole sponge bath
sh*t and the 3 super lame shorts.

The singing episode(s), I only recall one which is all singing with reused clips (where Snakes comes in through the window to rob them)

I also pretty much hate the episode with Grimey cause it was too realistic and kinda serves to make you think about how stupid the Simpsons are.