This comes up occasionally, and my opinion is pretty much the same. I do vastly prefer the look of clear windows. Ideally, they're somewhat tinted to hide the folded up robot bits inside, but it's not 100% necessary. Painted windows aren't an absolute dealbreaker, but I do wish they'd avoid the "Allspark Blue" color that they seem to default to. A nice glossy black or dark blue / purple usually looks ok.
When clear windows can't be done well for whatever reason, I don't despise painted, but it's never my preference.
When clear windows can't be done well for whatever reason, I don't despise painted, but it's never my preference.