Lord High Munchkin said:Personally I use a Tech Level scale of my own (as do a fair number of other GMs I know), so that isn't an issue. That also allows the "stripping out" of a lot of things I don't find useful from books like CSC.
The only major difference in a setting such as The Culture really would be AI, which is covered in detail in the two robots books, if required. Trade is less of an issue too, but, as you say, character driven stories dominate that game-style, so is not so prominent.
I avoid changing too much, too many house rules scare players, I find. Personally, I reserve them for when I shoehorn Metamorphosis Alpha into my campaign using Strontium Dog, fun stuff. Plus changing the tech levels means that your players can't look at the UWP and know what the common TL of the world is.
Agreed, trade would be a issue as Banks stated that the Culture was a command economy, whereas the general trav theme is of a market economy. Against a Dark Background works for an awesome trav world though, traveller as stated in the early, it is just a basic framework to recreate any scifi background.
BTT: One reason that Sophont is such a great word, is that as is usual in science, it is specific and not an adjective like sentient, without having the unfortunate consequence that sentients and sentience sound the same and sentients is improper, my spell check lights it up.