I think I'm starting to like Rainbow more. Dragonshy really made me hate her. But I think later Season 1 and Season 2 made me like her more.
That Native American episode had her firmly helping the buffalo (a little too much perhaps), that pet episode made her appreciate what a pet is supposed to give you. And Read It and Well, made her open her mind up to a hobby she found uncool.
She's starting to grow on me.
I can imagine Zipp probably being annoyed that her role model is a cocky brat kind of like her sister, but I bet Zipp would appreciate her overtime.
Also I actually like how Dash comments how absurd situations in MLP can be.
(Also Pinkie Pie is growing on me in Season 2.)