I do not know about you, but I really liked how the buttons look, etc. in Mac OS Tiger. But for some reason in Leopard they decided to remove all this beauty and replace it with a uniform gray.
But there is a way out.
You can make the controls in Leopard look like Tigers. To do this, enter the following in the console:
defaults write -g AppleUseCoreUI -bool NO
Now all newly launched programs will have controls like that of the Tiger.
how it looks standard:

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how it looks after entering the command:

to return everything as it was necessary to enter in the console:
defaults write -g AppleUseCoreUI -bool YES
PS: Now it remains to find out how to return the top white milk menu.