The great things in regards to PWP is they can be anything you want them to be. You can have them be for fun, for profession, for marketing, or just about any purpose you might like. LinkedIn and some other web pages have much more specific purposes such as business profiles and networking. PWPs can allow you to create a website and gear it however you would want, adding as much creativity as possible.
The drawback to PWP is the marketability of your page. One must use another forum to display ones page, such as broadcasting the PWP on a LinkedIn profile or Facebook page. With this being the case ones LinkedIn, Twitter, and Facebook pages are more linked to a world where others can view the page quickly without much need to search or find ones page.
In my personal opinion, a PWP done right is more beneficial to a person than a LinkedIn however, I feel that one must use the social media outlets to broadcast the PWP. Thus