Stuck in time

I have been working on this for awhile now, finally finishing this today c: I'm pretty happy with this, I feel like it's still missing something but I can't get myself around what it is, so I'm happy with it like this as long as I realize what is the thing it needs. 
I'm still in love with this pony, I love drawing him and this piece was fun to work with c: 

art (c) Demoarty 
Dr. Whooves (c) My Little Pony