It's all personal interpretation and experience of course, but for me the ONLY thing that kept me playing destiny was friends. Made lots of friends in year 1 that I play all types of other games with now. That was my best take away from destiny. I didn't find the content itself in destiny anything special (the VOG and KF being the exception, not the rule) and certainly would have been a one and done if playing solo. Maybe grind for loot games just aren't for me. I dont get the fun of repeating something that offers zero challenge and requires no mental agility for reward which is purely to run that same thing yet again. The best games in recent months (nearly a year of releases now) to me with the best experiences are all single player games (fo4, Witcher 3, uncharted, etc).