Programming style is very important. Clean code pleases the eye and improves maintainability of the program. Therefore it's directly bound with the quality and the architecture of the program itself.
Even in a language that forces indentation one can really broke everything with bad style. Bad style may not therefore be lack of indentation or comments. Actually, I rarely use comments, I much rather prefer docstrings and overall writing better documentation. I associate comments to small notes you spread around the code if you really see there's something to fix or wonder about in there.
I'd rather see bad style as not letting the programming language do some of your stuff for you. Proper, cleanly written macro in a place or two is really good style rather than bad.
