Sing and Dance Pinkie Pie - My mom found her at the Goodwill and gave her to me last Christmas (2011, not 2012). I know she isn't really special or anything, but she's just so giant! I love her!
Hippity Hop - She's simply my favorite G1 I own. My first So Soft (along with Best Wishes, but she's missing more flocking).
Posey - For starters, I love the Posey pose. While I do want to collect every piece of pony merch, I REALLY want all ponies in this pose. And to make it better, my Posey's mane and tail aren't faded!
Crunch Berry - I don't know why, but I love her bright yellow hair! She also smells great!
All three of My G2s - In my personal experience, generation 2s are the hardest ponies to find, hence why I only have three so far (six if you include two McDonald's ponies and a plushie). I get so excited when I find them due to how rare they seem to be.
Waterfire - My favorite generation 3. I love her colors.
Coconut Grove - My very first generation 3. As with Crunch Berry, she smells really good. Though, my main reason is that she was my favorite G3, so she's just special to me!
Funko Vinyl Derpy Hooves - I just like this line. They look really cool, and have better QC than normal G4s.
Funko Pop Vinyl Pinkie Pie - Same reason as above, better quality compared to Hasbro-made G4s. Also, the Pop figures are so adorable!
3.5 Cheerilee - Yes, you read that right. A 3.5 is a grail of mine. I just really LOVE Cheerilee's mane! So cute!
So, none of my grails are really rare or anything, just my favorite ponies in my herd.