Internet web directory listing is best way of getting thematic links but listing in niche directory of your website industry is more important. There are many reasons to it first of all we should understand the meaning of niche directory
Niche directory also know as specialized directory can be defined a web directory which is relating to particular industry or specific markets and geographies. For example web hosting directory deals only with web hosting companies and UK directory deals with only United Kingdome websites.
Niche or specialized directory submission / listing give theme based inbound links from it own industry directory which is considered as quality links.
You get quality traffic from these directories as it gives a customer which convert into sale
Best way of branding or creating an image of your products and services in your niche specific community. So Go for Niche Directory Submission Services
Finally I will conclude by saying that general web directory listing is part of SEO strategy but niche directory listing is more beneficial.