If a site with a PR value of five or above links to your site, then you are doing well.
Keeping this in mind, it is definite that you would want to have a high PR Backlink to your site from a premium site.
The effectiveness of this Backlink definitely depends on the PR the site carries.
You cannot get a strong link unless you know what establishes a strong Backlink.
A strong Backlink is obtainable from PR 6 or 7 or more.
If only your site has a link from a site, that has a PR 6 or 7, then consider yourself having a strong Backlink.
How to find high PR pages to get a strong Backlink?
There are various sites that have a PR of over 6. In order to find out the PR of a particular site, SEO tools come handy.
They are easy to access and provide guaranteed results.
For instance, if you want to search a particular keyword or perhaps key-phrases then do so on a search engine and you will find out which pages are ranking high at the moment.
Furthermore, you can compare the results from different search engines.
When you look for sites to get backlinks from or if you want to find out which sites are backlinking to you, then you can search for PR ranking sites that will let you know how various sites are performing.
It is certainly possible to submit your site to sites like myspace, metacafe, propeller and others, but groundwork has to be done before you top their lists or perhaps appear in their first pages.
The groundwork that is referred above is the fact that you must ensure that your website is done correctly.
Your tags should be organized and appropriately chosen in order to the Backlink for these high PR sites.
The advantage of having a strong Backlink from a high PR site is that it will increase your PR in the search engines.
To conclude, if you wish to rank high on search engines, your best way is to:
1. Create your website correctly.
2. Organize and appropriately choose your tags.
3. Get links from a high PR site!
Will Low PR Backlinks hurt your online presence?
My answer is probably not.
Low PR Backlinks will certainly not hurt your online presence but it will not do you any good either.
You may have several low PR Backlinks yet it will not raise your PR as fast as a high PR Backlink would do.
However, you must keep in mind that having too many high PR Backlinks can make search engines suspicious.
Make sure you are not being linked to by spam websites. Your best way is to keep your site as natural looking as possible, and have a mix of both high and low PR Backlinks to avoid being considered spam.