And what would be the point in playing that anyway? The whole reason I stopped using existing setting was because I felt that I couldn't break the status quo, and that's a miserable experience, I can assure you.

I would, of course, slap you if you decided to play Han Solo in one of my games. Not only for being completely in the wrong setting, but also because I get annoyed by people who blatantly copy existing characters. I've had to slap a number of Drizzt clones in my time...

Anyway, with the amount of time I spend worldbuilding (a ridiculously thankless task, since I can assure you right now that none of my players will ever realise the hours I spent reading on geology in building my current world), I really don't want to bother learning especially complex rules. It's part of the reason I was so glad to be rid of AD&D in the first place. If I don't remember the rule, I'll probably come up with something anyway.