What do you put on your hotkeys?

And is it better to assign all of your production buildings to one key and just tab through to make units?

depends on which race do you play

1a

Box click all units

A

1 for anything i'm using the most (usually lings/roaches/banes/ultras)
2 for infestors
3 for mutas/corruptors
4 for broods
5 for all hatcheries
6 for queens and creep tumors
7-0 for overlords/random other shit
f1-4 for camera locations
` for camera locations
space for idle worker

I tab through my production buildings.

Probably not the most efficient.

1-5 for Army hotkeys (mostly use 1-2, sometimes 3 tbh)
Q for Hatches, CCs, Nexus
W for Terran Production, Warp Gates
` for Overseers, Observers, Nydus

1,2,3 army
4 barracks/fact/starport
5 ccs
6 either units or *** or floating building, etc. just w/e i need

1 marines 2 barracks

1 main army
2 templars
3 stalkers
4 warpprism/main observer
5 nexus
6 robo
7 stargate
9 secondary upgrade (twilight/cyber core)
0 forges