Hello, Liv!
You've definitely found an awesome resource here. There seem to be people who like every generation of pony, and people who may know about restoring them. (I'm really new to MLP, so I can't help you there.)
I only really "discovered" G3 ponies a few weeks ago when someone told me about Strawberry Reef. I wish I'd heard of them sooner. Some of their designs are totally unique and adorable and I cannot wait to get a few. I think my favorites are Soda Float, Butter Pop, Desert Blossom, Tea Leaf and Bee Bop.
Have a nice day!