After trying various distros in the world of Red Hat, Slackware, Mandrake and SUSE I settled with Debian in around 2000 and just stayed there. I have played with Ubuntu in various flavours but the way Canonical are going now is just not on. Snaps and Flatpaks are a space hogging dog's dinner and I just don't trust them. OK I do have a couple of Appimages for stuff that is otherwise just not available but that's the exception.
Recently I switched over to MX - bit of a love hate relationship in the past but it is now doing the job nicely. Good blend of stable, with backports and repackaged upstream stuff easly available.
I swapped over to XFCE when Gnome 2 came to an end (actually I think before then because it was when XFCE still had the CDE drawers in the bottom panel......)
Enjoy using Trinity (KDE3.5 as continued by the Trinity Desktop project) usually the Q4OS version. Been using that since 2015 I think it must be.
Really cannot get into KDE Plasma - it just seems so 'brittle'.
TBH the early photo editing tools for linux were pretty dire but things change. These days it is mostly Darktable and Lightzone. FastStone under WINE is still very useful for a lot of quick edits, and even gThumb is getting there slowly.
GIMP if I must but never been a great fan.
JASC Paintshop Pro 9.1 under WINE is good for some tasks that I might have tried to use GIMP for.......
I still run Picassa - again under WINE - as some of its quick edit/styles are very useful with old slides after scanning.
For a lot of jobs xnViewMP is really useful - especially batch jobs of renaming, resizing etc. Also it's a very quick RAW viewer.
For default picture viewing geeqie is really nice.