This is the greatest Anime Series I've ever watched. I personally love mecha animes so I loved it all the more. This series is a Masterpiece and I STRONGLY suggest watching both seasons 1 and 2. EVERYTHING about this show was amazing
Story - extremely compelling and interesting premise 'Geass'. Tons of plot twists and great storyline
Art - fantastic and probably one of the best at the time it was created
Characters - you truly get to see Lelouch and everyone else grow. the character development is astounding and the trials and tribulations everyone goes through as well as the changes in personality as the show progresses is enjoying to watch and see unfold
Easily my favorite anime of all time and please do take the time to finish up the 2nd season as well if you watch the first, great continuation and ending