Towards the end of last year, I starting working on a modpack for myself and some friends which focused on some mods I really enjoyed, and the result was Cubertron. I put it down for a while, but with 1.8.9 on the horizon, I thought I'd throw this out there for general release. The pack is available on the Curse launcher as "Cubertron".
Some points on how the pack is configured:
HQM is enabled in hardcore mode by default, you'll be questing for extra lives
Tech in the pack generally focuses on RotaryCraft, ReactorCraft, and ElectriCraft, although alternatives are available
That said, BigReactors and IC2 are not in the pack
Mob difficulty is enhanced with the addition of Lycanites mobs
I recently updated the pack to include FastCraft as that has arrived on Curse, along with some other tweaks. At this point the pack should be in a pretty stable point. If you're willing to check it out, I'd love some feedback.