just the sync part makes me wonder who wouldnt want that? I know some people wont, but there are so many benefits about having Microsoft account vs local account
the only negative point, but I understand it due to security reasons, its a non easy way to log in the computer automatically (or remove the password) you can do it when the computer is in sleep mode or hibernation, but not when you restart and shutdown unless you go usercontrolpasswords2 and do all the stuff there.
but just the sync part is awesome, last time I had to reinstall my dads computer twice, but I installed office the first time. the second time office was automatically put automatically in startscreen the way i put it first time. so I didnt have to do anything. skydrive and having apps from store is another nice thing. you dont have to use it but you can use it. so yeah for me Microsoft account is nice.
also when I get in my computer through remote desktop or the files network thing (I dont like using homegroups). I always have to type my email and password, which is long and it would be easier to just put the old "123" and end haha, but like I said I understand I have to put all that, and you can deactivate the password for everything