Isaac Asimov

I am a huge fan of the writer Isaac Asimov since the mid 90ies. By now, I probably have one of the biggest collection of his works in the south west of germany (at the moment approx. 360 items, and increasing).
Beside the Foundation trilogy, I especially like his science essay collections.
Also I am interested in audio book versions of his works, which I usually buy on rather old tapes on ebay and transfer them.
If there is anybody else as crazy/passionate about Asimov, I would like to hear from you.