So signed up to these forums just comment on this pack. Coming into this, I've always considered myself a tech focused user (finished Material Energy 4 before this), getting machines to do everything. But, Regrowth has made plants and magical based mods fun, so I'll definitely be using them more in my future minecraft endeavors.
I've currently got myself a very tiny AE setup, running my base power through a 7x7 fire essence golem harvest field. Fire seeds burn for 250mb of lava in the crucible furnace and I'm using Mekanism Heat Generators (3) for all of my RF needs.
Loving this pack so far, probably going to focus my attention to base aesthetics and completing existing quest lines now. I haven't even touched Fish or Bees yet!
Looking forward to getting rewards for the Forestry, Mekanism and AE quests in the future, setting up that many basic circuits is a pain.
Also, a bug I encountered getting this power set up: Hopper Enhanced Inventories is causing a crash for me. I had a hopperhock, feeding into Hopper Chest, directly on top of a b-space barrel. Didn't realise that you could hopperhock directly into the barrel, which makes my life easier.