For everyone that thinks this is in the future, it's not. It's an alternate universe, meaning that it's the same time period as us, just on another world. They live the same way almost, just are a lot more... not to say smarter but... a lot more progressed then us. They are still humans, they are still in our time, or whenever the series was made, they are not in the future. Just an alternate universe; almost an alternate Earth that is a lot more progressed.
This has to be one of the least sexist things out there. You want sexist? Watch FLCL (also known as Fooly Cooly). On FLCL, they have (...) mags that they just cut out the privates with black boxes. They also have a 12-15 year old girl screwing a 40 year old in the first episode, I think. And this was aired on Cartoon Network, which wouldn't even let Cowboy Bebop air (...) where two gay guys were kissing on a bed with their shirts off, and a sheet over them. Now, you may ask how that has anything to do with Chobits, and it has nothing to do with them! But I just wanted to show you irony.
Now, Hideki may be perverted, but does he ever get Chii to have sex with him? No. Does he ever make her serve him, make her worship him? No. Chii is very reserved and kind and submissive because she knows no other ways. She can not remember her past, or how to act. So she doesn't lash out or anything. Also, Hideki is very kind to her and treats her like a person. They find love, which is probably the purest of all between anyone, since it's between a percecome (can't spell) and a human. You may think a robot/computer and human can't go together, but they go against all odds and do. It's one of the greatest things in anime.
This has to be the BEST anime for showing true love, not just 'aww I love you' and a week later, they're divorced. Chii and Hideki have a very strong, true love that most people don't even know of being possible.