I mean normally, like in the MLP Forums header image, there are 2 ways to see the ears. 1 way is the ears looking forward, another way is the ears looking the direction of what side that ear is on (different directions).
I might draw an image on my 3DS if you don't understand me.
For me, I see the ears looking to the sides of the pony's heads, it looks better to me. I think most people will say forward, though.