Generally, I think it's all preference with two exceptions: PB Swiss slotted are generally better than others, and Wera hex plus is a superior geometry. That said, here are mine:
Full sized:
Slotted: PB Swiss Swissgrip or Heyco (Felo Ergonic in green)
PH/PZ: Felo woodie, though I also sometimes reach for a Stahlwille Drall 3K in PH2 and a Heyco (Felo Ergonic in green) in PZ1
SQ: Würth
Stainless: Felo Ergonic
VDE: Wiha, or Wera interchangeable blade set
Beater SL/PH: Hazet (Oplast) striking cap
Hex/torx/anything else: only use bits
1/4" Bits: Generally Würth except for Wera hex (because they're better) and PB Swiss PH (for easy color ID)
Bit handles: Felo Ergonic, PB Swiss, or Würth ratcheting, depending on mood; Wera Turbo (useful for low torque applications such as electronics cases); Dewalt Gyro powered
Torque: Stahlwille Torsiometer, Facom 404
Precision/micro:
Slotted: PB Swiss, Wera, Felo, Stahlwille (Witte), Hazet/Gedore (Oplast)
PH: Wera, Wiha
Hex/Torx: Wera, PB Swiss
Bit handles: Wera, Wiha old-school, Felo
Bits: Wiha - I've actually twisted a few of the slotted Wera Easter Egg kit bits, which was quite a disappointment.