That and loafers. I'd been slipping on my (tied) sneakers for years, while all that time I could have had a shoe designed for that and that looks way nicer and lasts far longer! In America, you can dress those all the way up to business formal and down to going-to-the-grocery-store! So versatile. What a fool I was.
Incidentally, we in (at least certain segments of) this industry definitely have a look. I've got a pretty good record of spotting tech workers in non-tech-heavy areas and settings based solely on clothes & affect taken in from a distance, and I don't just mean when one's wearing legible clothing with some tech slogans or logos on them.