That was done ages ago. Can't say why, honestly. Maybe it's from grown out of most pony jazz. Ponies on the whole are uninteresting to me, whereas griffons seem to have their own nature, their own culture, not to mention generally looking far better.
Octavia is still my favorite pony I would say. But, without much to go on about her, I'm finding Gilda's climbed above her by the by, and besides that, other griffons provide more rooms for possibility and imagination than does Octavia.
Plus, truth be told, 'Tavi is a might too different from me. Wouldn't be easy to become friends. Griffons fit more of my interests, and personality, I'd say.
Why does everyone always remember Octavia for me, anyway? I've lusted after a decent lot of characters. Albeit, Octavia was probably the one with the highest posting around her, but that was mainly due to being a rather unappreciated character at the time.
I like to think I was responsible for helping build up a fair chunk of her popularity. Wouldn't be the first time I was ahead of the curb like that.