Do you look for anything specific or that it just looks normal? I've never done this but it sounds like a great idea.I try to remember to look at the plug before plugging it in. Only one time did I see a damaged charger plug that I then didn’t use.
And obviously the handles can get hot but if it's extremely hot I'll change chargers. That's rare but has happened a few times in my 4 years. Might just be normal too and my paranoia speaking.