1) Microsoft Office - If you are going to go with Poor UI below the Ribbon change would be the same. LibreOffice, like it better than MS Office, I even installed on many people machines and the majority like it better. Only tools use Powerpoint.
2) Games - I agree, but I play all my games on PS3
3) Poor UI - Unity is OK, its growing on me. Use Windows 8 then come back about Poor UI (WTF happened to the start menu)
4) Package - Ubuntu has this beat, the add/remove programs is awesome, its like the app store on mac. You give a poor example of the old RPM days, which was a pain, but have not had issues for ever. The majority of people will never venture past the default repos.
5) Standard Config - the .folder system is great, super easy to migrate. But I beat you think windows registry is a good idea.