My favourites are landscapes - especially hills, mountains and snow.
What I have done over the years is collect some high def pics from the web.
Then I realised that I could use photos from holidays too. Doh!
When out walking/cycling I'll stop to take a few photos on my phone.
I'll add these to my wallpapers. I now have 400 in my collection (no people
).On my home laptop I run a slideshow for the wallpapers so that they randomly change every 15 minutes.
In this way if I see a wallpaper it will either be a pleasant scene, remind of a great holiday or a nice walk/cycle ride.
The wallpaper displays for a while dimply on the lock screen (Linux).