I had no fewer than three older gentleman who have been shooting firearms for a long time and have massive collections of such, recommend a Judge as a self defense gun to the new girl I was teaching to shoot. I then had to take her aside and go into a very long explanation of why she should trust *my* judgment (as a young guy who has been shooting for about two years) and get a Glock instead.
I was told that I should get a revolver as a first gun, because semi-automatics are too complicated. None of the completely-new-to-handguns people I have taught have had a problem picking up the concept of the extra buttons on a semi-auto in the first five minutes, or failure drills in as much time as it took to learn how to reload with a speedloader.
I have been told over and over that 9mm is the bare minimum for a self defense cartridge, and you should really carry something that begins with a '4' or ends with a 'magnum'.
My grandpa (a military vet and hunter since he was 10) tried to correct my thumbs-forward grip to holding my wrist with my offhand, because he was sure I was going to catch my fingers on the slide.
Mostly, I am amazed at how much more I have learned about guns from this forum and a couple blogs, compared to people I know who have been gun nuts for ages, hold carry permits, have huge collections of weaponry, and even have volunteered with the local firearms rights groups for years. It does occasionally make me concerned, because these people do still know much more than I do in some areas, but it's difficult to always know what you can take at face value and what needs a large grain of salt.