Mine is more FWIW observation than anything. But I know I'll be tire shopping eventually, so I'll throw this out there.
Bought my '86 Connie last fall. It has Avon Venoms, front and rear. They had about 1K on them when I bought the bike. They looked basically brand new. I've since put another 6K on them this season and they still look new to me. No cupping in the front, or squaring off in the rear.
As for my observations/evaluation, I really don't have anything to compare them to. This is my first bike in 35 years, and my only set of tires on the Connie to date. I really have nothing to complain about. They seem to ride just fine for normal commuting (50 miles/day) and the occasional camping trip. 99.99% of my riding is 1-up, and camping trips put another 70 lbs on the seat behind me. I'm 59, and this being my first bike in ages, am not very aggressive.....tho I do love a spirited (but conservative) run. I rode for about an hour this summer in heavy rain at highway speeds and never felt like I was in danger of losing traction.
I have nothing to complain about with these tires. I guess I won't know if I have anything to rave about until I try a different set.
I see from many comments that the Avon Venoms don't seem to last very long. I haven't measured tread depth after 7K yet, but they still look to have a lot of life left. Unless they go to hell in a bucket, I expect I'll get another season out of them.