That's interesting you mention that Dawson, I've noticed that in GT6 the Comfort tires definitely have the most pronounced (read obnoxiously loud) squealing but Sports and Racing are both less voluminous and my more bearable, at least to me. I generally like how much the Comfort tires do squeal it's just too loud compared to other sound effects, most interestingly though the actual sound between the 3 basic grades has a different "texture" to it too so burning rubber from a standing start sounds different if you're using Comfort, Sports of Racing tyres which I do think is really cool.
Rick I sort of agree in part particularly about the Aston Martin One-77 at Morning Wood, the damn car is like driving a greased pig and was an absolute nightmare to get around the track. Ironically for me I really enjoyed driving all the older cars at Goodwood, it didn't help that Skid Recovery Farce is stuck ON so gave a false impression generally, but I had a lot of fun driving everything except the few modern ones they threw in.
I finally got around to picking up my C4 ZR1 last night too, compared to GT5 I think it actually handled / performed (and even sounded!) quite a bit better though it did have a fair amount of understeer and was quite the elephant under braking, though it did at least kick the back end out if pushed (stock). I did a stage 1 weight reduction, windows and carbon hood that took it from 1600kg stock down to about 1420kg or so and that helped immensely with understeer / braking.
I have also decided that I still hate the many MR cars in their stock form too, even with the new physics. Mostly I think because they don't fit my driving style so I end up with constant snap oversteer particularly under braking, fortunately it can be tuned out for the most part and there are still some that run just fine stock for me.