I'm running a lot at the moment. I've got:
3 Forge Input Slots
Bigger Backpack
Bdubs Vehicles
Buncha Stuff - My private mods
DCM_Liquid_Cars
Food Safety
Grizzlys 60k Stacks - Changed to 20k since 60k resets your base
Harry's M4A1
harvestable zombies
InstantCrafting 3.0
Josh_ExtraEquipmentModSLot_A18
JRB_ZombieLootDrop_10
JunctionBox
KHA18-BackpackButtons
Shorter_Reach
SMXhud
Stamina_Regen_SexualTrex_A18
tier 6 crafting
vehicle storage mod
My private mod adds 2 treasure maps (Adam's Family and The Count of Monte Cristo), items such as cut diamonds and rubies (part of aforementioned treasure), re-added recipe for log spikes, more. I'm currently working on a separate mod for realistic calibers. Hell, I modded Harry's to be 5.56mm like an actual M4A1. Most of the mods I have are to facilitate me killing zombies and for preparing for my killing of zombies. I try not to break balancing but it happens with some of it. Got really annoyed by annoying craft times so I gave up on that one. I agree with previous posts mentioning the backpack. The vanilla backpack is stupid small. I get that you can carry 6k worth of rocks many times over but with the sheer number of items in the game it just makes sense to be a bit larger. Oh, and I got tired of every ■■■■ car being exactly the same so I grabbed two mods. Might lose the Bdubs as I believe that one only allows for them to be crafted.