Yes, I am one of those philistines that manipulates photos. I know there are people who prefer the original image be left as it was taken.
In my case I often mirror my photos in one way or another. I’ve been doing this for awhile, so I now take photos with mirroring in mind, which usually makes for a better image.
Like any special technique or effect, if it is used without much thought it usually makes for a ordinary image.
That’s my 2 cents.