I've you're looking for a great plot, probably the best and most intricate an anime can come up with.
Great drawing and animation.
I love the aspect of Geass and it's abilities and how smart Lelouch is and how you see him develop and how he uses his powers and brains to get what he wants, he's sort of like a Frank Underwood from House of Cards. Except imagine Frank Underwood with Geass..
All in all, I love mecca animes so if you enjoy meccas watch this show. If you don't enjoy meccas, still watch this show because it deserves a watch anyways
