When I first started watching this anime, I was a little more than bored by the plot as no one suggested me to watch this anime, yet it seemed to be a big deal on the net. Turns out it was hehe. I would have to say this anime deserved all the actual awards it received and the score I gave them. This is because from the Story to the Enjoyment level of the series, it was at a constant high.
So...without further ado, I'm sure you'd like to read about the details, instead of me waffling and wasting your time...
Story: A rather perplexing story I have to say. Not that I'm giving you any spoilers ( I hope), but this is one of the rare anime that I find that has a rather sad ending. However you view what Lelouch does, it can be a happy/sad ending. Anyways, from the first episode, I thought the explaining was very thorough and somewhat plausible. Therefore, the story is something that a viewer of this series should be seriously paying attention to. I promise you that you'll love the plot of this series and it won't disappoint you.
Art: I personally found the art to be pretty detailed, something you should expect in a series that features cool mechas. Nothing really here to complain about as a top-notch series like this shouldn't have any art errors present.
Sound: I really liked the opening and ending themes of this series. Not that it stuck in my head the first time i listened to it, but it was somewhat addictive. The soundtrack itself was fit perfectly according to the tension at a certain moment. Subarashii!!!
Character: As the same quality as the story, i found the characters to be very well developed and I didn't have to use wikipedia to gain further knowledge on certain characters. The characters themselves also seem to have plausible personalities and were very well scripted as well as the casting was kanpeki desu!
Enjoyment: I cannot express how appalled I was after completing on 7/12/2010. It definitely called out to me to re-watch it at least 2 or 3 more times...AT LEAST, but I have Sekirei up next waiting for me.
Overall: Well if you couldn't tell how impressed I am by this anime, then you must be retarded. Solid marks, solid anime, solid carving in my mind that Hangyaku no Lelouch is a definite re-watch and later classic ;)
Total 100% or overall 10/10
