I would be much, much more likely to subscribe if there were more quests available.
I am level 28 right now and it's simply getting more 'why do I keep coming here again?'
Truly, you've built an amazing world and I want to give you money to keep this thing going forever and ever and ever PLUS tell all my friends to give you money, too!
But I'm just not there yet.
I love the graphics, the exploring, the animals, the freedom to design my character, but as I progress in levels I find myself asking more often 'whats the point of this venture?'
Like that famous gamer Gertrude Stein, I need more there there.