I've always enjoyed my leather clothing. But i'll admit on my Roadglide I just like wearing my jeans and a T-shirt (preferably with a roadglide on it!).
The wife had all textile for a while. We had an interesting test..we were riding a ferry standing at the bow of the ship with our gear on. Her in her textile and me in my leather. It was pretty windy plus the ferry was clipping along.
Test result: My smooth leather clothing allowed me to stand tall without any buffeting. My wife on the other hand was being blown backwards cause her clothing was not smooth and it picked up the wind like a sail. So in that regard leather wins!
Another time I wore my all black leather with all my vents open riding through a provincial park and it was 105F outside. She was in her breathable textile. We got stuck behind all the motorhomes and were baked in the sun.
Test result: Eventually I ended up dropping my bike in a parking lot from heat exhaustion and being stupid. She was very hot too but didn't have to operate a motorcycle.
After that I went to the T-shirt and lots of gatorade! I still wear my leathers in the cool months. Never did like the textile.
That's my spin on things!