Is page rank important for site ?

[frank]

Yes Pagerank is very important for any site. Because through PageRank other people measure what level is your site reputation in eyes of search engine. It describes your quality work.

I am not saying that you are wrong but as the last PR update was a year ago and it will be not getting any updates in the future, so it does not play so much role now-a-days. As lots things have changed within this year.