So I caved. I bought the entire McDonald's set tonight. At my McDonald's, that means the following.
Keychain Rarity
Keychain Applejack
Keychain Fluttershy
Keychain Lily Blossom - I made up a brief history for her. According to me, she's a horticulture specialist from Manehattan with her own private garden on top of a skyscraper with no roof access. She is a pegasus pony, after all.
Keychain Pinkie Pie
Stand Rarity
Stand Celestia
I understand that a few of the toys are from last year.
Oh, and don't forget about Dashie. I have her linked to the sub-chain that holds my car keys. XD If I had a custom Cerberus keychain, he'd go on the house key ring.