The best part of groovenaut (aside from how much I enjoy chatting with people) it's that if someone wants to talk about something they have, but are too shy or do not know what else to say - you can give them an icebreaker question without having to feel like you're putting yourself out there! There isn't any one thing in particular that sticks out at me as being my favorite feature; however the fact so many features exist makes choosing difficult for anyone who might be interested.
That said, everyone needs somewhere online where we can relax and chat comfortably -- and this fits the bill perfectly.