The new look
I enjoy the new look, unlike many of my close friends. It is clean, elegent, and faster than the cheesy aero interface. I enjoyed 7's look better than the CP and RP for a while, and ever since the Developer Preview I have grown to enjoy the new squared idea. When aero was removed, I loved the new look. Maybe it is just me, but I like this OS a lot.
Mounting VHD and ISO files
I have had a broken CD reader for a while now, and creating ISO images have become mandatory to installing a new copy of Windows or other OS. VHD's for VMware or (now) Hyper-V's virtual machines can be easily edited and safer to dual boot with.
WordPad has been included once again with Windows offering a Word-like interface unlike some older editions of Windows.
All file types are set to "Select a file association" by default. Easier for me, but comment if you have any more?
Continue adding to the thread if you have more likes or dislikes?