Now, that is of course just a subjective look at things, but I would absolutely despise having a rigid, fixed combat system like those of the typical pen and paper RPG in place. I came to thise site in order write stories and interact with others, and I am willing to put my trust into those I interact with to 1)possess common sense and if needed the ability to have a constructive discussion about things if there is the need to talk about one's actions, and 2)have the balls to call me out on bullshit that I might be doing, because everybody fucks up at times, but if nobody talks about it nothing will change. And I will say that in the vast majority of cases, both points are very well satisfied by this community, with those problems that arise from the way things are being resolved very swiftly.
If on the other hand there would be a fixed combat system, then I would feel robbed of alot of the liberty I could have during the interaction with other characters. If I would want to have a fight resolved by a die roll I would go and play D&D. But I want a fight to be resolved via words; by telling the story as it unfolds, without any weird restrictions. In the end, it's all about the participants communicating and figuring stuff out together anyway. Common sense and communication.