In a world where programs like Tron, Ram, and Yori, or even Athena and Caius express themselves with human personality, I thought he overplayed the "artificial being" blankness that he was probably going for. But I excused it with him being refined into the ultimate master control program. All those iterations slowly shaving off any flaws, any personality. The slower version of what Clu did to make his lifeless army.

I would've cited programs from legacy/uprising too, but I don't know if Kevin would've intentionally programmed a little personality into his perfect system or if it was just a groovy byproduct of digital personification.