From an aesthetic point of view I think that Twin Peaks holds its own after all these years. Because the story is set in a small town were very little had changed in the last 40 years, the sets, the locations and fashions do not put a specific time stamp on the story. Therefor, it does not age badly unlike other dramas produced at that time.

The cinematography is beautiful. The warm copper tones, the rustic locations and the eerie sets with ominous black spots are unique even to this day. Twin Peaks was shot in a more cinematic style than shows at the time and I think even by modern standards it still has a feature film quality about it. Notably the first season and the Lynch directed episodes. In my opinion, you could take any single frame of those episodes and it would make a beautiful photograph.

The acting, I think was purposely heavy handed. It's in homage to David and Mark's love of 50s soap operas. The whole over the top drama being a real escape for viewers. Just look at Invitation To Love!

Music, again much like the acting I think was purposely laid on thick. I know it sounds super cliche but the music really is a character in Twin Peaks. They become as easily identifiable as the characters. When's Laura's Theme hits, you know something eerie is happening.