Aldarc
Legend
I suspect part of that tension has to do with a certain degree of "play to win" mentality that is a portion of the play culture of D&D, many traditional games, or even video games.I as well. But I think this is actually an interesting topic, around which there is sometimes some genuine tension. I often play my characters "suboptimally," doing "stupid things" because "that's what my character would do." And if this leads to adverse consequences just for my character, then that's fine. But when it leads to significant trouble for other characters as well, there might be some tension.
I'm reminded of how @Campbell has in the past talked about how other non-traditional games sometimes let them roleplay their characters with (in his words) "greater integrity," because the other players will know and expects that "feces happens" as part of play, so they can focus on roleplaying their character without worrying as much about whether they are playing optimally or any sense that "suboptimal" play will have consequences for other player characters. That resonated with me and my experiences with these other games or even traditional games.
By no means am I casting aspersions at anyone's roleplaying when I say that sometimes I do think that there can very often be a certain degree of "characterization fudging" of PCs when it comes to a variety of out-of-character factors: optimal play to "win" the game, playing nice with the other PCs, keeping the group together, taking your bad day out on the game, etc.