My faves are Sunshine Gurl and Cool Lev, who go together in my mind. For the Fierce line, I like Neonlicious best, and Gracie Skates for the tweens.

There are a lot of popular ones, but Kitty K and Moonlight BB come to mind first.

Also special mention to Sweets, Sports, Melrose, Miss Royale and Shadow.

Top one on my wishlist atm is La Rose.