I really love HN and I check it multiple times per day. I have yet to find another place on the internet that's anything like it (personally).
"Betteridge's law of headlines is an adage that states: 'Any headline that ends in a question mark can be answered by the word no.'"
Still, I don't know any better place to geek out casually right now. Slashdot sure ain't what it used to be. Twitter is dead. Reddit ain't the same anymore. Where else would people go?
/r/programming is dead /r/technology is boring
Only other place with active tech discussion is 4chan.org/g/