I've owned both a GS-R and an ITR.
I have never missed the GS-R after having the ITR.
You know those Subarus commercials? "You either get it, or you don't."
No harm, no foul if you don't "get it."
The ITR requires a driver's attention in a way that many cars do not.
Those of us who enjoy driving so much that it's actually a hobby will like the ITR. Those of us who view the automobile as a tool for transportation might not like the ITR.
I can't really tell you what
you will feel like after a few months with the ITR.
You either get it. Or you don't.