I'll like to get opinions and thoughts from folks on the pretty permalinks versus the default, ugly permalinks.
I've seen some interesting plugins and themes that either rely upon or require that your permalinks be pretty (post name and date, for example). I've also seen a couple discussions, on other forums in regards to permalinks in regards to search engine optimization. The debate seems to be that some folks believe pretty permalinks are essential to a properly search engine optimized blog. On the other side are folks who say that ugly permalinks have nothing whatsoever to do with SEO.
Please chime in. Give me your expertise, advice, opinion, experience.
FYI - My blog is a few years old and I've used the default (ugly) permalinks the entire time.