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But first- I'm not talking about EXCEEDINGLY sharp, and I'm not talking about an intentional "dreamy" effect- nor intentional softness in portraits (although IMO it's done way too often in the name of making a simple portrait "artistic"). I'm talking about the vast majority of photographs that look better when they're in focus than when they are not.
And in closeups of pets and wildlife, if the eyes aren't in sharp focus, most pros and publications assume the photographer screwed up. Look at photo mags and our own Nature and Wildlife Forum to verify what I'm saying. Regardless of all other sharpness issues, the best closeup shots have the eyes in sharp focus.
Back to Maddie:
1. I gave up on "unsharp mask" long ago because I finally decided it didn't help sharpness.
2. Here's what I do, generally, about sharpening:
a. Click on "filter." Then put the arrow on "sharpen" and choose either "sharpen" or "sharpen edges," according to what the image seems to need. I usually do "sharpen."
b. Then I click on "Edit" and "fade sharpen" and use the slider to get what looks best to me.
c. If I think it needs edge sharpening, I do the same thing using "sharpen edges." This one can be tricky because it sometimes adds a rimmed edge (especially when the subject has a sky background). I have ways of dealing with that- but they're pretty complicated to write about.
3. That's it- and I'm done with sharpening.
Note- sharpening should be the last thing done in PP.
Also note that after a few times, these steps go a lot faster than reading about them.
In the case of your Maddie image- because I was illustrating my point, all I did was "sharpness" at 100%. I could have used the slider to refine my intentions, but it's not my image, and, as stated, I was simply illustrating a point.
Also, your shot was a closeup with a wide aperture, so the depth of field was extremey shallow. I'd have liked the nose to also be in focus, but that's a personal choice- and is not relevant here because it needs to be done at the time of shooting- not in processing; and we're talking about processing.