Simply, yes.
Story: One of the most well known aspects of Evangelion is it's story; it is simply unorthodox, as it does the process of not feeding all of the story the viewer; it drip-feeds it, giving the viewer only half the story, or sometimes giving scenes without any context. For some anime, this would be a disaster waiting to happen, but in the case of Evangelion, this is done almost consistently masterfully, holding back information on such subjects such as SELEE or The Angels. Many have critisized the holding of frames later in the series, but taken into the context of the fact they were running out of money to make the show, is is understandable.
For many fans, their major criticism of the anime is the handling of the ending, which many consider far too 'out there' and simply crap. I too, am not a huge fan of the ending, but taking the ending to the TV series, inside the context of the 'true' ending movie, The End of Evangelion, the ending can make a lot more sense, and thus I enjoy it far, far more. To stop me from ranting on for ages, Evangelion's story is a master stroke in writing, one which has been a hard feat to replicate.
Art and Sound: I was introduced to Evangelion through the in-progress tetraology of films, The Rebuild of Evangelion; due to this, I became used to the cutting edge graphics employed for the higher-budget films. And to be honest, yes, the TV series art is beginning to show it's age 20 years on; however, this does not detract from the series in any major capcity, as the art compliments the anime extremely well.
The sound is also fantastic, and a very high-point for the show. Excellent music is employed to showcase the fights against the Angels, and for darker moments such as the internal struggles of the main cast of the show. Some of Beethoven's music is featured later in the series, which coupled with the emotional impact of the scene, produces one of the most excellent scenes in anime history.
Characters: By a massive leap, the highlight of the series. Evangelion features in it's story the struggles of the main characters, to devastatingly wonderful effect. Weak, timid, daddy-issues Shinji, to powerful, arrogant, egotistical Asuka, to the quiet, mysterious Rei, and the dark, apparently agnostical Gendo, Evangelion develes into the mind and motivations of these characters, showcasing exactly what makes them tick, and this is what gives us some animes most regonisable and wonderful characters.
I am certain entire essays have been written on why certain charcters tick, and that's another reason so many of these characters are so wonderful. Fans are so devoted to their favorite characters (personally I am partial to Rei and Gendo), and this creates a wonderful feeling when learning about these characters and then discussing this with other fans. Generally, Evangelion employs some of the most human characters in anime, showing us that the heroes of anime aren't always strong, both mentally and physically, or not even in control of their lives.
In closing, Evangelion is one of the strongest anime ever produced. It employs powerful characters, a deep, deep story, and art that has only just began to show it's age. What makes the show's longevity even more powerful is that even now on sites such as EvaGeeks people are still analysing this series, trying to know everything about it. I hope Evangelion will live on in the hearts of it's fans, who'll continue to appreciate it's deep, metaphorical story. I hope that Evangelion will always remain an anime that will be treasured, for all the ages.
