I think you'll like it here.
In my opinion INTJ and INFJs do have a lot similarities and generally function well together so I think that you'll fit in here just fine.
I joined the INTJ forum several months ago but didn't post around much. It was a bit too structured and rigid, but I enjoyed reading INTJs opinions. And when it comes to INTJs a have a mission of sorts to study their habits since it was an observation of mine that you guys tend to be very self-disciplined which is something that I need to learn asap. So the more nice INTJs here, the better for me.