3.91 good or bad

I don't consider a 6.5 hour trip once a year "I drive it on the freeway".
To me that's like saying I have a race car because I take my street cars down the strip once a year.
That's my opinion.

Obviously the amount and type of driving one does is what will make the difference.
If you are just driving your prized vehicle a couple weekends a month to car shows, local gatherings, and to the closest Sonic then your threshold for tolerance is generally a bit higher.
Our cars are true daily drivers. Everyday my dad or I is driving one of these cars somewhere.
Not being able to have a conversation without yelling, and running the car at 3,150 RPMs @ 60 MPH everywhere we go gets a bit old, extremely quick.
Taking a couple hundred mile trip on the weekends is not a rare occurrence in any of our cars.

I drive my 69 383 Roadrunner 200 miles a week mostly freeway driving. I love my 3.91s, no biggy running the motor a little faster. I'm not tired of it yet!