I actually think you might enjoy Taken King more.
There is a lot more content to the game right now:
You haven't played Dark Below or House of Wolves; means story missions and quests.
You might have exotic bounties you haven't done yet.
You haven't gotten elder ciphers yet from PoE.
You haven't done Crota yet.
You haven't gotten Necrocasm yet.
You haven't tried Trials yet.
You haven't tried Iron Banner yet.
Also, play with other people, it's a lot more fun that way. I only keep playing because I play with other people. Found a cool group and started our own clan. The game is so much easier and it's nice to get help from people but also being able to help them when they need it.
In Taken King we'll get:
A new sub-class for each class.
A more intelligent RNG system.
More bounties and quests.
Actual cutscenes and story telling.
New gear to chase.
A better levelling system. You won't need to find armor with light to level up. A big improvement.*
Ghosts and class items will actually matter; XP and perks.
I can't know for certain that the RNG system will be as good as they're saying. But I am hopeful. Definitely keep your peeled for reviews when TTK is out.
I've personally done almost all I can in Destiny:
Still chasing elder ciphers; missing two.
Still doing Pocket Infinity; just need to kill in nightfall with a fusion rifle.
Still chasing Hawkmoon and Monte Carlo.
Haven't done Skolas but I can never seem to get a group together when there is no lightswitch. He's a pain the ass anyway, but a elder ciphers is almost guaranteed when you beat him.
Otherwise I've pretty much done everything in the game. Just waiting for new content.
*I remember starting a Warlock and Hunter and being tuck on level 26 just because I couldn't buy legendary stuff from Vanguard and had to farm rep to rank 2 so I could buy stuff with 36 light in them. And then level enough to do Prison of Elders level 32 for a piece of amor with 42 light in them. Happy that nightmare is over. Now everything you do gives you XP, keep playing the game and you'll level up.