The Condiment Wars

What is your favourite sauce of the big three :

Ketchup - Arguably the most widespread and common sauce used for flavouring your burgers, BBQ and other dishes. Can be considered the normie basic-guy option from others opinions.

Mustard - The yin to Ketchups yang, also widespread in dishes previously mentioned in Ketchup section, either exclusively used or paired with Ketchup combining the flavouring.

Brown Sauce - HP, Daddies etc this sauce is pretty popular in the UK (Where I live) and goes great on chips/fries and prior dish mentioning.

It is also a cardinal rule to be put into bacon sandwiches among the brown sauce community.

What is your favourite sauce to use?