Me: "We should do X!"
Client: "I think Y would be better."
Me: "If you're sure..."
Client: "I'm the one paying you!"

*much development time passes*

Client: "We should do X. Isn't it your job to think of these things?"
Me: "..."

That's why I document EVERYTHING and don't have verbal agreements. If a dipshit wants to veto what I know is good for them, I get it in writing for everyone to see. And I will always refer to it when they ask why we went that route.

@sgorneau indeed! Although little is gained from making the client feel like an idiot ... it must be done tactfully.

Yes, documentation is very important. People conveniently forget who said what when the finger pointing begins.

Happens a lot