Whoops!
Forgot two very prominent AIs from a prominent contemporary writer:
David Weber's DAHAK, from MUTINEERS' MOON is a worthy successor to Mycroft, and very computerlike.
Nimue/Merlin from the SAFEHOLD series, on the other hand, is more reincarnated human than a true AI, but still, technically one. More in line wth Raymond Z. Gallun's demi-gods from PEOPLE MINUS X, but both examples do explore the issue of identity so, for the philosophicaly inclined.
As for Chobits, she is a fitting descendant to Helen O'loy as well as Julie Newmar's Rhoda from MY LIVING DOLL and a particular kind of robot we are *already* seeing in the real world. In Japan, naturally.
http://www.telegraph.co.uk/news/worl...irlfriend.html
(I'll skip the other real world examples; it's not a tech I particularly appreciate. Humans already have enough ways to isolate themselves from the world and each other.)
Of course, quoting Chobits opens up the door for John Smith, the Red Tornado, and his siblings. Also Brainiac, Kilg%re, Ultron, Jocasta, Vision, Cliff Steele, the Metal Men, and a zillion killer AI's robots from both DC and Marvel.