[irrational]

One time I laid down two options of what we could do. I did not mention that one would take much longer than the other, because I didn't want that to influence their decision. I thought we should do what was best for the business and end users, not what was easiest for me. Well, they chose the longer and harder one. Later on I learned that they really wanted to go with the other one, but thought it would be harder for me to do. Doh!

Of course, this also happens in real life. I was building new kitchen cabinets and when we got to the doors I gave my wife two options of top rails. Again, one was harder than the other, but I didn't mention that because I wanted her to pick the one she liked better. Of course, she chose the harder one because she thought it would be the easier one even though it turned out that she preferred the other one.

So... always give the other person all the information.