I'll go with Keychain and post my favourite loadout from each class. Keep in mind that I actually change loadouts a lot, depending on the team I'm on or the current situation. For example, when attacking as a Heavy I often use the Tomislav and Dalakohs Bar. With some classes, such as the Spy, I seldom change loadouts (since my Spy technique rarely changes), but otherwise it mostly depends on the situation at hand.
That being said, each loadout was chosen because I've been using it a lot lately (which often means it's my favourite anyway).
That being said, each loadout was chosen because I've been using it a lot lately (which often means it's my favourite anyway).