Partially adapted from https://github.com/tsumo/tf2configs/blob/master/README.md, most useful are autoexec (performance optimizations), defaults (resets binds when switching classes), engineer and medic (actual significant gameplay use). cfg files go in steamapps\common\Team Fortress 2\tf\cfg

Detailed explanation of why and how to use custom captions, closecaption_english files do not go in the config folder, they replace files in steamapps\common\Team Fortress 2\tf\resource (make sure to delete any caption files in custom HUD)

I use m0rehud custom HUD with these changes:

• moved the players alive/dead status bar to the lower half of screen to check easier (TeamStatus attribute in the .res files)
• increased size of target health cross and hp number for better visual clarity on medic (look in SpectatorGUIHealthCross, SpectatorGUIHealth, TargetID)
• replaced captions for more useful information