Well I just upgraded to pro 10 from 9.5. Hmm I have to say im not sure about the look. Its all very abletonesq and looks very cluttered. It feels very slick though which is great. Projects load a lot quicker too. Its just a bit painfull on the eyes. Hope they will reskin it again with an update or at least an option to choose. The interface looks so darn ugly.
After using 10, the same thing that always happens happened. I get used to it and then if I try going back, the previous version looks funny. Having said that, you can change it up in the preferences. I chose a look halfway between 9 and 10.