This question is a bit complex, depending on how you ask it.
And where you try to answer it, in which country.
And for what activity. I mean surveillance camera are one thing, street photography is another and you may not be allowed to do street photo at all, even in (public) places riddled with surveillance cams…
Xfce & Cinnamon.
If I had to pick between KDE or Gnome, I would go KDE without any hesitation as I quite like it whereas I’m not really a fan of Gnome. Gnome UI is OK I guess, it’s just the way they want to decide for everything I am not a fan of (After 35+ years using Apple, I did not switch to let anyone else decide for me ;). If I don’t use KDE it’s mostly because it requires too much work to “tone it down” and make it behave like I want my DE to. Out of the box, there is too much features I have to turn off and configure, features that are also spread between too many (and not all of them… obvious) menus/settings. What’s great with KDE is that it’s at all possible to configure all that, it’s amazing. It’s just too much for me. Be it XFCE (on Debian on my desktop) or Cinnamon (on Mint on the laptop) I barely need to change anything to have them do what I wish.
So, to summarize I would say it’s my untamed laziness that dictates my choice of a DE :p
It’s also the reason why I do not use one of those tiling WM I know exist and I know, as a user spending my time with my fingers on the keyboard, I would love to use in place of the standard floating windows. Alas, having them correctly configured and running, and then having to relearn decades old habits, would require a time and an energy I have no desire to spend. So, I don’t. Still, I understand why some people like them so much ;)
edit: clarifications