As John Gruber says: “Six major releases of Mac OS X. Six times, the same guy has written the best review.”
Find it here.
An excerpt, regarding Leopard’s odd new menu bar:
It’s more of a “menu smear” than a menu bar, as if someone painted it onto the screen with Vaseline…
It used to be worse, believe it or not. In prerelease versions of Leopard, the menu bar was even less opaque—comically so. But Apple gets zero points from me for lessening the degree of transparency. That’d be like congratulating someone for extinguishing the left half of his body after intentionally lighting himself on fire.