D&D 5E Most Used 5E Rule Book (Besides Core Books)?

[briggart]

My current character is an Armorer Artificier, so Tasha's. As a DM, I'm currently running a Saltmarsh campaign which has currently morphed into a Storm King's Thunder one.

 

[Voadam]

Tasha’s as a player.

Kobold Press’s Tome of Beasts as a DM.

 

[Guest 7037866]

Xanthar,s for players

VGtM and MToF for DMs