I find KDE desktops a lot more similar to Windows than GNOME-based ones. If you're looking at Ubuntu, give Kubuntu a shot as well. The "Unity" desktop that Ubuntu now ships with has been a subject of considerable
controversy since it diverged so much from GNOME II flavors. As a KDE user, this is all irrelevant to me.
Canonical has been diverging from other distributions because Mark Shuttlesworth is trying to position Ubuntu as a "brand" like Windows or Android and downplay its roots in Linux. Unity is a part of this strategy with ports in the works for phones, tablets, and TVs. In that sense it has some similarities in philosophy with Windows 8. Canonical has also embarked on a project called Mir to develop a new programming interface for the desktop to replace X and
compete with Wayland. Needless to say that is a controversial decision as well.