Starise
I don't dislike Studio One. In fact I like it...but something inside of me made the decision long before I admitted it to myself. I told myself that it might be because Sonar was familiar but as someone else has pointed out already SO is easy for almost anyone to get into quickly . Within 15 minutes I had learned key shortcuts for all the basics and I was zooming along with it...but I part ways with those who think it is the greatest thing to ever happen in a DAW. It didn't really seem to be leaps and bounds over anything I can already do in Sonar...and I found myself taking recordings I had made in Studio One into Sonar so I could do something to my audio that SO either couldn't accomplish or Sonar did it better. SO does have a great audio engine in it...but so does Sonar for my purposes. 
 
The way I see it Studio One is still trying to add  things that Sonar already has. I have been over to the Studio One forums on and off. One thing I find is that some people over there are thinking about jumping ship to Sonar. Some of them like certain things Sonar can do better...it never ends...no matter what someone has they think there's always something better....I want to concentrate on making music and let the DAW be very low on my priorities list.
 
To hear some talk it would seem that the right DAW almost makes the music for you...LOL!

That's where I'm at as well, Tim.   I like S1 and I always thought it was a fairly slick DAW (got on board at v1.65). However...  there's some intangible aspect to both that keeps me in SONAR land.  I do "master" my mixes in S1 + Ozone so that I'm at least doing something with it... 
 
I also have no immediate plans to upgrade to v3.   I do like some of the features they've implemented, but as an S1 Producer user the elimination of that middle tier doesn't sit so well.  
 

This is one area where I think S1 really excels...mastering. Not that Sonar isn't capable with all of those presets to get you close.   I think it's all of those cool intuitive mastering tools I liked in S1. They really do have that together well.

I haven't tried the latest V3 of Studio one, only V2, but when I did I liked it ok, but not better than Sonar. Part of that may just be familiarity, part of it may be my work style. Whatever the case I thought it was nice, but I had no interest in buying it.
 
If I didn't have a DAW I might give it more of a look, but as it stands I don't find it to be any improvement on Sonar in a substantial way.