I am voting for INTP as well. ;]
He is too 'unemotional' for an INFP, furthermore his hacking abilities and great interest in Computers (The Matrix itself is a huge computer program, so…) sound more like INTP.
His 'otherworldly fighting abilities' are of an iNtuitive nature, very reminiscent of Eastern Culture and Philosophy (Meditation, Yoga etc.), that's why I think he is more of an Introverted INtuitive than Sensor.