Amadeus (1984)
Damn. This was so much more incredible than I could have fathomed. There's really no way to truly describe what I like about it, actually. I just had a generally positive reaction to it. The acting was great, the music was obviously great, and I really admired its method of storytelling.
I admit I watched the Director's Cut, and nothing really seemed out of place especially or unmatched (except for that brief vignette with Constanze, which... I suppose it supported her reaction to him in the ending, but felt a bit odd)