iserith
Magic Wordsmith
Once again I'm your opposite, my friend; as I prefer a published setting only when no-one is familiar with it (except perhaps - perhaps - the DM), thus to avoid canon lawyers, unmet expectations, and a DM who may not be willing to change the canon to make a better game.
But, as there pretty much isn't any such setting out there these days, I'm homebrew all the way.
Canon lawyering is a personality issue as is the DM unwilling to change the canon. Don't play with those sorts of people. I don't.
I think a lot of the reasons you're "opposite" me is, so far as I can tell from this and other posts, gaming in a way that tries to address people's various personality issues. I just don't play with people who have issues.
As a player, I'd rather explore something completely new to me, which can't happen if I've helped build it in the first place.
Lanefan
You could just not offer up anything in such a game. Everything the DM and other players build will be new to you.