I think the keyword there is "control" given I've heard numerous times that Steve Jobs is a bit of a control freak, so-to-speak. I just don't think he should decide exactly how my Mac's desktop looks. He can pick the default, but I should be free to modify things from there. With iPhone, it gets even more problematic since you can't add more apps yourself without jailbreaking the phone.
Macs have a reputation for being for creative people...well... creative people tend to NOT be robots and want their computer to look like everyone else's so it bugs me that Macs are by FAR the LEAST friendly to theming. Be creative, but not on your computer desktop? Honestly, it smacks more of coming across like Apple thinks we're too stupid to figure out how to modify settings so they just decided to not give them so we can't screw it up or something. How about a nice big red RESET TO DEFAULTS switch then?
This is one area I totally agree with. I have a Mac service business and it's weird to go to a client's home and see their Macs look like mine at home. I don't care for the fact the Apple has only allowed the user to change only the color of the traffic lights and scroll bars and even this has only one color change option.
Window UI should be colorized by the user and even the current menu bar, the user should have the option to change the color of it.
I'm hoping but I don't see Apple allowing much customization in Leopard either.