Must admit I have been wondering what to do now my titan is level 29 but I can still get obsessed with the grind, however if nothing changes much with pve then I will get burnt out on the game I'm already struggling finding reasons to build my warlock class.
As for PvP I actually enjoy it on most maps as it as a challenge, I don't really care about matchmaking I play for my pride you could say same as most multi players when running solo however it was fun playing with the guys the other night and it was relaxing compared to raiding etc.
The story side really does need fleshing out etc