I don't game with other people much or use mics, but I like to check in on what other people are playing and sometimes it's useful to have several Destiny players on the friends list. Especially some of these Taken Champion fights on the Cosmodrome. Man are those near impossible alone at 240 light.
I also play NBA 2K, but the online is horrendous this year even compared to past years. Really the only other thing I play online besides Destiny is random Diamond Dynasty matches in The Show but even that fell off after the summer.