In this episode Satsuki has to avoid hearing the piano ghost playing Fur Elise three times or she dies.
I think this episode has been re-watched by me so many times because its both a relatively tame episode (I'll explain) while feeling the most "believable" to this world (okay I'll have to explain that too).
What I mean by this episode being relatively tame is about where the humor is coming from. Most of the humor comes in how lax each of the characters are about Satsuki being close to death. Even Satsuki. Because the humor can only be dialogue based the jokes can come in the characters making fun of what their doing, explaining what they are doing, or getting angry at the show itself (in fourth wall breaks) as to why they don't just do *this/that*. So, the episode rolls with the punches and realizes that Satsuki really doesn't seem that worried for the first half. So they have her laughing off the threat saying things like, at least its not creed.
Which brings me to my second reason for liking this episode. For me, obviously I love this show for what the dub gets away with. The fact that this is the real dub and not an abridged series is always a buck wild shock when its watched for the first time. But I'll admit that now when I re-watch an episode, I find it far funnier to think of this world and characters as real.
Not to say this episode isn't funny, those cow print pj's deserved what they had coming.
So, for me, this is the episode where the ghost stories crew feels arguably the "nicest" to each other. (well, nice for them, most of them start of pretty A-Okay with Satsuki dying). But because this isn't family guy where all parts of writing and development can be decided by Seth Mcfarland or other creators - ghost stories always has to make the animation make sense. Therefore, characters (especially Hajime) can talk a big game about not caring and only wanting to have sex/drugs/etc. But when it comes down to it they always help out and stop the ghost, even if reluctantly. (Who else is going to go in first, again!)
Like any good show, even an outrageous one like this. The ideal is for the show to feel lived in. So these character switches may seem/or could be out of character - or we can chose to believe that these characters know what's going on. Even if they would prefer to be doing literally anything else, they know they have to stop the ghosts. Or maybe the ghost stories crew just enjoy's pretending they're all hardheads who don't care about Satsuki dying, but they do actually care, even if just a little (Well, keiichirou actually cared a lot.)