I'm currently not buying right now, but I wanted to post my list here so I can have easy access to it.
G4 Wishlist! Playful Ponies:
Valentine Pinkie Pie w/accessories or MIB
Wave 1 Rarity MIB
Wave 1 Applejack MIB
Wave 2 Cheerilee w/accessories or MIB
Wave 3 Blossomforth accessories only
Traveling Singles:
Wave 2 Diamond Rose accessories
Wedding Singles:
Wave 1 Applejack w/accessories or MIB
Promo Packs:
Daisy Dreams and Fluttershy w/ accessories or MIB
Rainbow Flash (accessories only)
Skywishes lose
Shine Bright:
Target exclusive Fluttershy w/accessories
Target exclusive Pinkie Pie w/accessories
Bridle Friends:
Pinkie Pie w/accessories
Fashion Style:
Pinkie Pie Boutique Car and Pony
Princess Luna and Celestia Canterlot Pack w/accessories
Wave 2 Rainbow Power Daisy Dreams MIB
Snow Globe Ponies:
Twilight MIB
Cadence MIB
Accessory Sets:
Afternoon Picnic with Cheerilee MIB
Camping Trip MIB
Sweet Slumbers MIB
Other sets:
Royal Ball at Canterlot Castle w/accessories
McDonalds (all complete w/accessories):
2011 Pinkie Pie
2011 Fluttershy
2011 Princess Celestia
2011 Applejack
2011 Cheerilee
2012 Rainbow Dash
2012 Twilight
SDCC:
2013 DJ Pony
2013 Twilight
2014 Manic-Mayhem
2015 Chicken Pie