Angelic Layer, Chobits Recommendations
Chobits pretty much takes place in the same universe as Angelic Layer, making it somewhat of a spin-off. If you pay attention, you'll see light references to Angelic Layer. It's even mentioned once later in the manga. The creator of the Angelic Layer game is also the creator of the Chobits persocoms. However, the connection between the anime adaptations is very different.