So, I kind of gave up on the story after the first mars mission (Exclusion Zone). I've picked up the strikes and missions doing the various other activities (weekly strikes, daily story, Queen's Wraith, and strike playlist). I'm now a level 26 Titan. Personally I don't feel like I've missed anything yet, but will probably get back to the story at some point. I did the same thing when Oblivion came out, finishing the story months later. Anyone else doing the same or did you finish the story before moving on?