Expressions should be persistent.

[Terrini]

I am in 100% support of this thread.

I would have /taunt up at all times.

Caption for that picture "You mad, bro?"

However a default expression should still change a with other emotes, so if you wanted /huh with a /taunt, you'd still have to use both emotes. Unless you could /huh default where you do the action, but your expression doesn't change.