Great thread OTWO.
I imagine that your experience would have been different if they knew that you were not "around" any more. I have gotten sick of the false smiles/pity/"are you OK" thing.
As for "spiritual" conversation, we spent some time with my family recently and noticed that what qualifies as "spiritual" conversation is really gossip about who's getting divorced, who's getting married, who's not regular at meetings, etc. A real eye-opener. My wife is very interested in Jewish history and theology and eastern teachings. You will wait a long time before you hear any comments about any of these items among JWs. And if you bring the subject up, be prepared for blank stares.