I gotta tell you.
I have been working with a number of DAWs lately and sometimes I'm tempted to migrate a bit of my work on them (I need a flexible score editor, dammit!

). But I keep coming back to Sonar because I can't stand the colour schemes of any of them. Also, it sounds better. But that's another story.
You know a lot of DAWs look like they've been designed by someone with a Star Trek: the next generation fetish.
It's also true that maybe I'm old school and you need that visual feedback to create dance music.
Example: Cubase, not to name names. Terrific program with a fantastic audio engine and great workflow. I can't look at the damned thing for more than 30 minutes without wanting to switch it off. The colour gradients are an eyesore and give the screen a bit of a Fischer - Price vibe. Again maybe it's me. Probably I need more neutral looking environments to create my stuff; I prefer to use organic sounds augmented by the sporadic textural synth so take that in consideration.
I can tell what bothers me about the Sonar GUI as well (it's fair to move critiques to all the players in the game).
The menus still have that Win 95 look to them and the same you can say for the quantize window and the such.
I find it spoils the awesome high class polished vibe of Skylight. Aside from that the GUI is one of the reasons why I prefer Sonar over other products.