The community is friendly, the posts are well written, the interface is BEAUTIFUL (unlike Soylent which looks like it got thrown up on), there's no corporate tomfoolery, the image preview system is pretty tight, RSS that works reasonably well, and the community isn't weirdly antisemitic (looking at you Soylent). Slashdot is like New York, Soylent is like Detroit, Pipedot is like some pleasant southern town where you're always welcome, and things move slow.