In reply to Miroslav Glavic.

I know they claim not to use %category% but I have used it like this. note post_id thrown in to make sure no identical links that may conflict.

/%year%/%category%/%post_id%/%postname%

I don't see a problem with this; however, unless you want to run buddypress or some other feature that requires permalinks, url rewrites, and caching, I would just leave the default on a small traffic site. No need in changing the default without good reason whatever that default may be.