It was my first one as an adult, and I don't regret that decision. So much so I went on to read the book, what did you think of that? The next one I had watched as a nostalgia trip from watching it as a younger man, was The v Shining. After that I decided to watch Dr. Strangelove... That was... Different.
I actually have never read the book all the way through SHOCKING I know. I just can't ever get over "Childhood's End" which made me feel cheap at the end because it was not "wrapped up" to my satisfaction. I guess I should read it. OKAY FINE havires I WILL READ IT GEEZ. Dr. Strangelove is an odd one for me, because I actually DID read the book it's based on "Red Alert" before I had even heard of the film. The book is a very serious take on war while the movie is much more comedic. I would also suggest "Full Metal Jacket" and "Paths of Glory". Actually just watch them all (am I coming off as a Kubrick fan boy? I can't believe how many military movies I've actually watched now that I think about it)