Hmm, not sure if relevant, but there's a chip in my windscreen, which is on the passenger's side. Very distracting whenever there's a passenger, they always seem to touch it (even though they can't feel anything) leaving smeary fingermarks on the windscreen as if the chip isn't bad enough already.
Another distraction is things like maps, bottles of drink, sweets, coins etc rattling around. Perhaps you could think about proper storage compartments for these (most cars have suitable storage spaces for these, but never enough!).
Take a look at the interior of the new Ford Transit for ideas:
http://www.ford.co.uk/ie/transit/tv_interior/tv_mobile/-/-/3/28
they have a compartment specially designed for taking A4 sized binders and suspension files.
By the way, I drive a small van, which is really a car with a big box on the back, and storage space is non existent. Therefore I may have a map, delivery notes, bottle of water, high vis waistcoat, clipboard, small packages etc all sitting on the front passenger seat, and whenever I brake hard (which is not very IAM!), it all goes crashing into the footwell creating a mess![/quote]