I’ve thought about this all day, and this really is an impossible question. Sufferfest videos don’t “tickle” the senses. I fear all of the videos equally.
But, I can tell you the videos I especially don’t like: The Omnium, Violator, the session that shall not be talked about, The Hunted, The Wretched… and I think that I don’t like these because of how much they destroy me.
I love the humour of the shorter videos - Joyride, The Cure, SUF Idol. I’d ride Cotty’s videos any day. Also love the longer rides - Cobbler, Blender and ISLAGIATT - although I don’t get to them as often as I’d like.
So. If I had to choose three, they would be, in no particular order: Butter, Team Scream, and The Chores. Like what @TTDragon said.