N-thing the desire to see more boy ponies, like Big Mac, Soarin, and my personal favorite, Thunder Lane <3 However, I would hope to see them done differently than Shining Armor, his overall design is...really unappealing to me. And although I'm unsure if I'd ever actually buy her, I'd love to see Granny Smith pony!
But what I'd really love would be playsets and accessories that don't include ponies. I try not to buy doubles of ponies, but I really, really adore all the little accessories that came with the castle sets and I dearly wish they came as a pack on their own to purchase instead of having to deal with a pony I might not need/want.