I've currently got lenses that are like: ~18%, 65% and 80% VLT.
I could use the 65% pretty much all the time. I might squint a bit on really bright days, but they'd be OK.
The 18% are nice on...

But the VLT's are pretty ugly to my way of thinking.
My 50 year old eyes won't like the 10%/15%/35% VLT's [Dark/mid/light]
10% is something I'd hardly ever use. 15% isn't bad for a bright, bright...