Long post , but I'll say in my experience and that's the only experience I can count on, I've never played a game for as longs as I've played destiny, I go through lulls but you will find me again doing the same story mission a hundred times and I still enjoy it! Esp for pve, I go through CoD pve in a few days Halo 5 in 2.5 days, fallout 4 should take more of my time but maybe it's too open world and I get bored. Just started doom and it's like playing on Roller skates so I bet that won't last long, I have the division unopened on my couch I should load it up. But all in all destiny has something I can't quite describe that keeps me logging in. Sorry horrific grammar!