Paneláky are renowned for their ugliness. But interestingly, these days most paneláky are no longer unusually ugly. Since the living space is still needed and many people own their flats, paneláky are getting spruced up. This structure from Zlín may be in relatively good shape, or it may have had a very unobtrusive face-lift, I'm not sure.
As for the Boskovice set directly below, I can't quite recollect either... either it's not such a bad-looking structure, or it had some repairs, but the color scheme is very much old-style panelák, with all that gray concrete punctuated by squares of less than inspiring plastic or whatever it might be. In the photo, and in real life, it looks fairly neutral. And in truth, with all the panelák renovation going on, I have not actually managed to photograph any classically horrible paneláky, with crumbling facades and streaks of soot all over.
Below, also in Boskovice, we can just get a glimpse of renovation in progress. The right side, mostly hidden by trees, is a work in progress with scaffolding. The left side has been resurfaced and given a decorative paint job in shades of peach. The fact that there are all those trees doesn't hurt either.
This panelák in Kutná Hora is definitely an example of the new look in paneláky. Some of them even have a certain graphic appeal. As one of our Rakovník friends says of the paneláky there, now you can even see the glimmer of an architectural idea. (Well, he said something along those lines. He indicated that they aren't so bad now after all, after all those years of being an eyesore.)