Yeah we will feel very attached to our mounts if we grow it from pets and evolve them into mounts. Not just an icon that you click and *poof* a horse appears :D
At the moment we don't plan on having flying mounts. WIth them you miss everything that our environment artists have done, these games are all about exploring and enjoying your surroundings. Also with flying you skip all the dangers, it's not fun without a little danger.