Legildur said:
(my emphasis) What? Unlike spellcasting, fantastic creatures of mythology, and feats of super-human athleticism?
Well, on an individual basis, I might have problems with each of those. The spell I might deem inappropriate for the game I wish to run, the creature to silly and thus ignore it or rule it doesn't exist, or that the rules for various atheletic feats are not particularly well thought out.
And that's what this comes down to, for me: personal choice regarding how I want my world to look and feel. I'm directing. You'll note for example, the close attention I pay to the terrain when talking about a spiked chain. If during the fight you encounter difficult terrain and balance checks on a fairly regular basis, then it will feel like you are in a real 3d world and not merely moving figures around on a peice of gridded paper. I want to put you in the wood, and not on a piece of paper representing 'woods'. If your character is standing shoulder to shoulder with your comrades and whirling a spiked chain without you thinking, 'How am I managing to do this without busting them upside the head, or slicing them open', then you aren't picturing what your character is doing in you head to my satisfaction. Your imagination is stuck in I'm observing a game mode and not first person cinema with 'shaky cam' mode, which is more what I want to convey.
So if you can (or I can) picture the guy casting a fireball, and picture the fireball expoding, then you've achieved the versimlitude I need. But if I can't picture it - frame by frame if need be - or if I think the picture looks silly, then my assumption is that it will look silly when you picture it to. All the rules to me should be designed to help achieve that experience, because its the experience I enjoyed as a player and its the sort of craft I enjoy creating as a DM. If you like a different sort of art, well that's your right to do so (and I may even agree you have legitimate reasons for it), but the converse of that is my right to defend my sort of art as being valuable or even preferable.
So, to be brief I've no problem with versimiltude of a wizard casting a fireball because that's whats supposed to happen. I do have a problem with versimilitude of a chain that exists nowhere in space except when its striking an opponent, because that particular chain is not supposed to just disappear and become ghost like except when its striking the opponent.