I have to say that sometimes I would like to be your ponysona. But my favorite forms would be still Twilight and Rarity.
Here's my ponysona I made about a year ago, it's entirely based on my personality. Unfortunately I don't have a picture, but it's a tall gray Unicorn with blue mane and alicorn muzzle, his name is Night Dreams and he doesn't have a cutie mark because of his powers:
Night Dreams
When transformed...
+ You become really good at things you are obsessed with.
+ You are very polite, and you never swear.
+ Magic cancelling powers - You can even stand near Celestia or Discord and as long as you are near them, they become powerless!
- Asperger's Syndrome, which can be good or bad, but usually people who don't know you think that you are mentally ill.
- Number of phobias, such as, fear of infinity, fear of being alone, fear of touching human skin and many others.
- Your obsession can reach absurd levels for other people.
- You have no friends, and it's hard to even try to make friends.
- You are capable of easily killing an animal without remorse, and ponies who don't remind you of your family. You can also watch gore videos of fillies being abused and it doesn't move you at all. You wonder if you have emotions like other ponies. (You don't)
- Your self esteem changes each few hours, from narcissistic supremacy to self hatred.
- Lack of hygiene.
- Altrough you are polite, you can sometimes say sometihng awful to your family, but later your regret it.
- You try to be incapable of hatred and being all forgiving, but it is destroying you.
- Eating problems.
- Since your power is cancelling magic, you are incapable of using telekinesis, being healed by magic, and you don't have a cutie mark.
I don't think that anyone would want to be me...