I just have to say this: The Ribbon Sucks.
I upgraded from 2006 to 2014 a few months ago and I have to say that the ribbon just sucks. I had to get my hardrive worked on and have to use a temporary set up for a week or two. I cannot really customize AutoCAD with this temporary set up so am forced to use the ribbon. It is just terrible with all that switching around and pulldowns you have to wade through and who knows where the hell the commands are located. Not to mention the screen space it takes. Did I mention how badly it sucks?
Yuck!
End of Rant.
Thanks for listening.