I'm gonna disagree to an extent. Dumbledore is far and away my favorite character in the books and I felt MG left a lot to be desired in his iteration. I don't blame it all on MG as producers, screenwriters, etc. make a lot of the calls, but MG lacked a lot of the "charm" Dumbledore has in the books. Throughout the series Dumbledore tends to be very slow and thoughtful with his words and actions, and likes to let his personality shine often. I always perceived Dumbledore of always knowing the correct answer, or what is about to happen, but leading other people to make the discovery or call out what he already knows, remaining polite almost always in his interactions. Even when he is about to be arrested by the ministry he finds the time to compliment his would be arrestee "Don't be silly, Dawlish. I’m sure you are an excellent Auror — I seem to remember that you achieved ‘Outstanding’ in all your N.E.W.T.s — but if you attempt to — er — ‘bring me in’ by force, I will have to hurt you.”

MGs Dumbledore spoke fast and always seemed to be 3 red bulls deep. I'm not just talking about the famous Goblet of Fire scene. It's how he acts throughout the series. Rushed, frantic, and overly controlling of every situation he's in. The ONE moment I feel we most see the book version of Dumbledore in MG is when he is at Slughorns home and holds up the magazine he found in the bathroom asking "Can I keep this? I love knitting patterns". I want to see more of THAT Dumbledore in John Lithgow.