As a matter of fact I always thought having a confirm choice screen will be a great thing for a few options - like build building, research, etc. and especially colonization (yes, I have somehow managed to colonize wrong province under the influence of alcohol before
)
I know such option will be annoying and we are not 13 to be asked twice, but some of us play at times where we are not in possession of our full mental capacities or even maybe have the click click click syndrome I suffer so badly from (which is exhibited in clicking in random place without any real purpose and tends to lead to disastrous results like ordering war horses 8
). It would be great if I had a second button to keep me in check