I make it a point to learn at least 1 new mod on every playthrough of Minecraft. This playthrough I (finally) learned EviromentalTech, WOOT, and Xnet. On my list to learn next is Steve's Factory Manager and Advanced Generators. (I know advanced generators is not particularly hard, I've just not taken the time to experiment with it yet) What I would like to know is what mods out there do you recommend I learned next? I am looking for complex mods that have a lot of flexibility to do a lot of things. I also enjoy mods that are difficult to understand how they fit together (Think Immersive Engineering's multiblock structures). What I don't want is mods or packs are designed to be expert packs, progression packs, etc. Thanks for the suggestions.