Well, after maining just a single Titan, I felt that yes the grind was getting to be too much. Along the way I picked up several pieces of gear for a Warlock and Hunter. Instead of breaking the "useless" gear, I stored it in the vault for the day I'd muster up the courage to brave another long grind from 1 to 27 (the level at which I can get through most of the raid without hassle). To my surprise, having all that purple gear and exotic pieces quickly jumped my character from 20 to 26. So basically I've been rejuvenated in my lust for more exotic pieces for each class and as many legendaries and exotics as I can get my hands on. I now have three different flavors to play in, changing up the way I play through each grind for Marks and Vanguard ranks. Can't wait till my arsenal is Crucible ready. I have plenty of guns I can use, but I've used them too much and I need to vary up the style. Leveling up subclasses and unlocking new abilities is fun again. And now...now you can Surf on your sparrow, so patrols are fun again too. Either way, not sure if my enthusiasm will last forever, but it is still there each night I turn on the game.