Everyone has their own comfort zone,some higher ,some lower ,just ride within yours and you will enjoy the ride a little more!
I'm with you. If I'm putting along on some country back road taking in the scenery and listening to the pipes "purring". I'm in my zone.I try to avoid highways and Interstates. When I end up on one, I run with the traffic, maybe a little above the speed limit and try to stay out of crowded situations. If I have to, I'll run a bit faster to stay out of congestion.
I much prefer backroads running 35-65