I've worn the same pair of shoes since October 2004 for almost everything. I walk around in them. I run in them. On the rare occasions I need formal shoes, I borrow. I just hate buying shoes.

Nike's Transformers Air Trainer IIIs are mighty tempting though.

Yeah, they look kinda silly, but I've previously worn red, green and blue pairs of shoes for years at a time. "Silly" ain't nothin' but an adjective.

Nike Air Trainer III Transformers [Footurama]