I don't remember how I initially found out about this site, I usually find them on Google including the ones listed below. I do remember starting to take it much more seriously after I read about it on personalityjunkie.com
I visit a lot of sites that have nothing to with personality,but all in all, my online hangouts have been (type-wise):
personalityjunkie.com Personalityhacker.com Lately it has included also typologycentral and 16types (socionics)
Much more than these, I visit: Google, google books, Wikipedia and youtube (Definitely my topmost visited pages, consistently for the last 8 or so years, basically ever since I got a phone with Internet services, lol!)
Also, Facebook (much more lately, though...since I moved away from my relations)
oprah.com marthabeck.com Amazon (I know, its weird) how-to-write-a-book-now.com litlift.com
There was a time I visited a lot of relationship/dating advice sites like: anewmode.com yourtango.com
There was a time I visited religious sites too. And political ones to do with my home country, especially around election time!