The thing that strikes me about Vista is the hap handed approach to user experience, for example every action seems to require confirmation, and reconfirmation:
Vista: do you really want to run this piece of software?Needless to say, removing all the crapware and installing necessary stuff is taking ages. Did i mention the countless restarts?
Me: yes
Vista: really?
Me: yes!
Vista: but you downloaded it from an internet site!!
Me: I KNOW. RUN IT.
Criticism of Windows Vista