New Start menu isn't really tablet garbage. Hell I find it easier to work with on a mouse as long as it has a scroll wheel.
Whatever suits you don't bother me... However, intrusive interface is the ones I hate as you have to do more clicks just to do things. Sure there the new hotkeys, but do you expect the average joe to know them. Not only that, it takes more clicks just to do basic things as shutting down or restarting the computer without touching the power buttons. In Mac OS X, Ubuntu and Windows 7, it takes 2-3 clicks to shut down, put a computer to sleep or restart it. In Windows 8, it takes 5 clicks to shut it off. Not only that, an average user who has no idea where to shut down will get frustrated as the hot areas aren't clearly indicated.
Change is good when it's useful (such as the Ribbon UI as it makes previously hidden functions more accessible), but I think the whole forcing the Metro UI on non-touch screen desktops and laptops is change for the sake of it. Instead of forcing this onto everyone, Microsoft should give a choice to users on what UI they want to use and leave it at that. Heck, I don't see Apple forcing the launchpad (iOS Home screen) on Mac OS X users, its stupid. Even with the popularity of tablets, desktops and laptops aren't going away anytime soon. Not only that, some Modern UI apps are useless without adding a Microsoft Account (and some people might not want to create one just to read email) and they are striped down versions of the desktop counterparts such as the Mail and Calendar Apps.
Also, I am a long time user Windows user even though I switch to Mac OS X full time since 2006 and even upgraded to Vista when everyone complained about it. Windows 8 has a lot of great features, but the modern UI crap just kills it on the desktop (It probably will work well on tablets). Not only that
businesses have no plan upgrading to Windows 8 and just recently, Microsoft fired the top guy, Steven Sinofsky. Clearly, forcing Modern UI with Windows 8 is a clear failure and there is no denying it as Microsoft might backtrack and restore the Start Menu from this disaster.
Aside from this, rant over...