I normally make my models clean and pristine. If I want to twist lines around, and the like, I do that with modifiers at render time. One of the main reasons for that is the modifiers are easily undone, the modelled deformities aren't. It's a lot easier for me to work from a clean base model than one that is already deformed.
Likewise, bevelled and chamferred edges multiply poly counts pretty steeply, and they aren't always needed. It is pretty hard to get rid of a modelled chamfer, but one right click -> delete to get rid of bevel modifier(s).
I don't know how much of those can be transferred out of Max. I think most of it can be, if I collapse the modifer stack and xforms before exporting; but there is no going back once you collapse (well, there's a couple undos, but I don't think they don't get saved with the files.)

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Not quite sure what you mean about organic. Do you mean that the roof lines and fronts aren't all on the same levels? or...

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