Comment 108 for bug 375145

While look and feel integration is quite important, and also not needing to install many dependencies would be a great bliss for many, I think there is another issue that is more serious: lack of integration with kde apps.

Right click stuff on nautilus and you get a sub-menu with actions related to ubuntu one. Open a folder from the ubuntu one client and you get nautilus instead of dolphin. Want to sync your stuff from contact? Nope, sorry, that option is only available for evolution.

Probably Kubuntu gets its share of love, but things like this make people feel Kubuntu is the unwanted step child.