I play abit of both, prefer solo but hm fps and ops can be very fun with the right group. Though I must say with the way commendations are given now, theres really not much to do once you hit lvl 60 and get 186 gear. You can run hm fps and ops over and over, queueing up for an fp via gf takes ages.
I like some of the OPs ideas, having a more dynamic way of doing content with others without having to slow down the gameplay in order to find a proper group.