Which mods do you add manually?

I was going to just add a bunch of mods to Monster using universal configs, but going through, found some of them to be less than useful for me. I was also concerned about bugginess of the less-used mods and don't want to pigeonhole myself by installing a mod only to find out it's buggy and there is a lack of support and being stuck with the world-gen or blank items if it's really game-breaking.

Which mods do you add to your FTB Monster (unleashed, unhinged, ultimate, DW20, etc) install that...

Which mods do you add manually?