Okay here's what I was working on when that idea for humanized PotatDOS fell on my head and demanded I draw it.
As some of you might remember, I had a half-baked concept for a humanized Wheatley thrown into an earlier attempt to personify GLaDOS in that "Oh it's YOU" scene. I decided I liked his head design enough that I wanted to carry that on into a full design. I thought about it a little, then realized I wanted his outfit to follow the same theme as my humanized GLaDOS'. So, the hexagonal Aperture badges, and the black strips, as well as the gloves, are continued. There are some variations. Originally it was a jacket-and-pants ensemble, then I decided that was too dressy for him, and went with a jumpsuit.
The blue hair and glowing blue eyes were a must. I settled for a grayer complexion than the GLaDOS personification's, just to show he's a personality core rather than a gigantic psychotic AI. Though he was one for a bit...I'll have to depict that change in him, but I can't do that until I've worked out his basic design.
Anyways, Wheatley and Portal 2 are copyright of Valve.