The processing for #17 and #19 are a bit over the top for me. There are little points that do not quite fall right -
For example for #17, the transition of the sky before the foliage and after the foliage (or rather, through) is rather visible. The amount of structure/detail is amazing but is pushed a bit too far for me. How do you put it? When there is too much to look at, the whole scene ends up feeling rather cluttered.
For #19 the reverse vignetting resulting in brighter corners is the giveaway.
Are these HDR? One way of overcoming these unnatural effects while retaining the intended outcome of taming the dynamic range is to paste the result over the 0EV scene to temper these issues, which come inherently when aggressive HDR processing is done. Cheers.