12086 - Well, as rule of thumb, all good fans/otaku have to see numerous well-known/legendary animes, and CCS was the main show that CLAMP made that shot its company into the mainstream. (Since it's shows were broadcasted in UK TV at one time, plus the amount of merch and how many seasons it went though.) There were issues with the english dub... It was shite! And the characters had changed totally, in names and personality (i.e. Tomoyo was Madaline, and instead of the softcore lesbian in the japanese version, she totally acted all american girl "like!")
So my bro got the Jap/subbed version and it was quite the entertaining show.
But it's not just CCS, things like Pokemon, GITS, Slayers etc. These, as far as I'm concerned are legendary and must see.