Never setup an MFR Laser Drill. Never got into Witchery beyond growing snowbell plants. Never got in Blood Magic. Saw a lot of cool things in the mod, just didn't want to go to that kind of effort. Don't mind the self-sacrifice, but just too much standing in one place and waiting.
Never used Sync. Cool mod idea, but... I have no use for it. Never played with Electricraft, beyond mining it's platinum for use as shiny ingots. Never played Hardcore mode. NEVER played a skyblock. Unless you count a stupendously unstable Mystcraft Sky Islands dimension.
I've never smelted villagers, if only because they all end up dead before I get the Smeltery set up.
I have to wonder if he means the Waila Harvestability add-on which isn't nearly as ubiquitous. Unless he's turned it off manually.
The list is too long to remember, but I'll drop a few that linger in my mind.
RailCraft - I've used the boilers and a few processing machines, but I've never actually set up a working railroad system. I've intended to a number of times, but so many options for transport (player, item, and fluid) are so much cheaper and easier that I've never followed through. Maybe this world...
Never actually used Railcraft for rails
-3 manpoints.
What? You haven't experienced the amazingness of Railcraft? Well you're just in time. The latest version finally added a Flux Cart, so no need for power at a destination. Now you can bring your power along with you. RF, Fluids, and Items all in one convenient form. Plus you can ride along. Also, TRAINS. *blows whistle*