I read somewhere, that readers tend to read more in one sitting if the chapters are short because they have the sensation to progress faster and want to read "one more chapter" before putting the book down.

Personally, I don't like very long chapters (some long books have literally only 3 chapters) but I also don't think 2-3 pages should be a stand alone part. Feels a bit empty. It think longer chapters are ok as Long as they are some kind of scene separation that can be a good stop (Murakami does this a lot).

I am wondering if it is better to mix thing around, or keep a consistent length of all the chapters?