I think my two favorites are Fool For Love and Intervention, but truthfully I have trouble thinking of other episodes that are so much about them. But sometimes I just want to watch the story with undiluted Spuffy and I'm pondering what sort of rewatching order that would be.
In other news, I've been making progress with writing my story for seasonal_spuffy tonight (my day is June 11 so more than two weeks to get it done). YAY. I've been feeling a bit down about writing, so making such progress feels amazing--my fic writing brain has been fizzling a bit lately from negative feelings about all manner of things.
But anyways, yay story! I've got it all planned out in my head and (I hope!) it's going to be: epic, violent, funny, schmaltzy, emotional babyfic Spuffy with a special focus on Buffy being badass, Spike being badass, Buffy and Spike snarking, and together finding moments of grace.