Directory submission on high page rank sites is very helpful for growing page rank of your website and also for ranking
Yes, Directory submission is very useful for your site. Because it is very beneficial for increase your page rank and backlinks. But matter is that you directory submission had done in high pr & fast approval sites.
For permanent link building and local SEO, directory submission is a good way. Also it is helpful for early indexing.
Directory submission is first step method of link building. I will list your website in category vise.