While the first may be graphically more pleasing, I prefer the the second as it is simply more interesting to look at. There is tension created by the juxtaposition of the two near-touching corners and dissonance brought on by the irregular and conflicting triangles. For these reasons, I would sooner put #2 on my wall than #1 (and I'm much more of a "realist" in my own photography in trying to create graphically harmonious photographs).
Thanks, Harald, for sharing both and for stimulating this conversation (and for reminding me that I really ought to break that harmony from time to time).