Rm w/a vu, The Bachelor Party and Hero for me.
R/m w/a Vu - the first time Doyle is given much to do we get the first hints to his past, the introduction of Dennis, him being buried alive in the wall is one of the creepiest things in the whole Buffyverse, 'we hope you're helpless', the ghost that doubts Cordelia's commitment to Sparkle Motion - all good stuff.
The Bachelor Party - 45 mins of back to back Doyle and he isn't dead by the end of it. It is my favourite of all 110 episodes of the show - I have been known to watch this one twice in one day. Plus Cordelia tries to ask Doyle out and my heart can't even take it.
Hero - up until the last two mins or so. I switch off directly after the kiss. No one wants to see that shit.
And the rest of the show really might as well not happen. Just how much do I not care about Wesley? All the much - that's how.