Boy, that’s a tough question. MI3 was what got me into this genre in the first place ~20 years ago and I do love Murray. In retrospect I mostly appreciate some of the graphics. While MI1 and MI2 have a much better story and design, to me MI3 is an integral if somewhat flawed part of the Monkey Island experience.
I definitely also enjoyed MI4, but years later in Tales I got stuck (or bored, rather) in a courtroom or some such. I’m surprised I even made it that far, because I just didn’t really enjoy it.