What aspect ratios do Pentax users like?

Barry Pearson wrote:

This question was prompted by an article in "Black+White Photography":
Issue 243, page 72 onward.

The author, Eddie Ephraums, discusses the way some photographers concentrate mainly on a single aspect ratio, for example 1:1, 3:2, 2:1, 4:3, 16:9, 7:5, etc.
And may become well-known for it.

He made himself a simple adjustable hand-held viewer so that he could judge scenes without needing to look through a camera viewfinder.
(Using such a viewer is apparently commonplace in cine photography).

Some cameras can be adjusted so that different aspect ratios are seen in the viewfinder.
My K-1-series can be switched between aspect ratios, including 1:1.
My Ricoh GRIII can be set to 3:2 or 1:1.

And, of course, images can be cropped later in Lightroom or Photoshop.
Lightroom has several built in aspect ratios, as well as "Custom".

So back to the title of this thread:
"What aspect ratios do Pentax users like?"

Perhaps with a follow-up question:
"What assistance (if any) would be desirable in cameras?"

The aspect ratio is selected during the postprocessing for most of my photos.

After a long time looking at my photos on a monitor,exclusively, I ordered a couple of prints from my last holiday. I ordered them 13 cm - but I did not realized, that the 13 cm is the smaller side and the longer side depends on the aspect ratio I selected before. My photos with ratio 1:1 were 13 cm each side and looked just small all. I had a few photo with 16:9 ratio - and they came 23.1:13 - very nice panoramas.

My this is exactly what you can expect and there is nothing special about it. But to me it was a nice surprise to get that large prints if I select a wide aspect ratio (for the same price as the tiny 1:1 prints).

Now, I will think about process towards 16:9 more often ...

Best regards

Holger

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Some useful articles:

• A thread of my own: "Revisiting SQUARE crop on K-1-series"
• At Wikipedia: Aspect ratio (image)
• How to Know Which Aspect Ratio to Use in Your Photography