I wish that theming was easier and approved by Apple so it worked better and easier and wasn't constantly broken by updates, but I also have to admit that at least some of the excitement of theming is doing something 'taboo'. Almost like being a computer 'hacker' without having to do something truly evil. If Apple finally approved of it and released an application to make and install themes along with a slew of Apple-brand themes, it would take some of the magic out of it.