I find myself pining for GT5 large ore veins, as well as some of the more interesting components and machines it provides, but I don't want to go back to the 1.7.10 version. I had trouble with the changes to the plastic and rubber processing that were added between 5.08 and 5.09, but since I've taken a break from the mod, I might be able to deal with them now. I know there's GT 5.10, but some of the mods commonly used with GT 5 haven't updated to MC 1.10.2 (or are still in early alpha for that version, and thus are hardly worth using, such as Railcraft, which doesn't include the large tanks or any of the machines), and I'd be surprised if there are any modpacks for MC 1.10.2 yet that include GT 5.10.
So far, I'm looking at using the following mods:
Applied Energistics 2 (nightly build alpha from CurseForge)
Autofish
Batty's Coordinates Plus (Forge version)
BedrockLayer
Better Foliage
Biomes O Plenty
CraftTweaker (I plan to use it to gregify recipes that aren't already changed by GT 5.10, and disable crafting of vanilla-style tools that have GT equivalents)
FastLeafDecay (by Olafski)
Forestry
GravelMiner
GregTech 5.10 (I plan to make a custom build with Greg's fix for negative-coordinate vein centers, unless Blood Asp beats me to it)
GTTweaker (I will try to do a custom build from the 1.10 branch)
IndustrialCraft 2
Inventory Tweaks
Iron Chests
JEI
JourneyMap
ModTweaker
More Overlays (for inventory search highlighting)
Mouse Tweaks
Optifine
Ore Excavation (mainly for cutting down trees, and possibly mining sky stone from AE2 meteorites; I haven't checked whether it will work with GT tools)
Peaceful Plus (since IC2 hasn't re-implemented crops yet, so I won't have GT crops to provide hostile-mob drops in peaceful mode; edit: mainly I'll be using this for getting bones as drops from passive animals; I'll be replacing some of its recipes with some of my own devising (like macerating magma blocks for magma cream, and centrifuging that to get blaze powder and slime if GT doesn't already have such a recipe), I think GT already has a recipe for gunpowder from sulfur + charcoal + saltpeter, and possibly I'll disable the less-useful recipes like mob heads)
Progressive Automation
Waila
Wawla
Are there any mods others can suggest adding, or mods I should avoid due to compatibility issues or being overpowered compared to GregTech?