Best Implementation of a Mechanic You Normally Dislike?

Following up on a previous thread about mechanics that are disliked, today I want to hear from the people who have played a lot of TTRPGs on what they think the best implementation of a mechanic they normally dislike is. Is there a game where you think encumbrance actually works? a Metacurrency that actually does meaningfully contribute to the game? Or some other system that you normally hate but, for one game in particular-it clicks for you?

Really excited to hear what folks have to say on this one!