So, I just started watching MLP:FiM this week after months and months of nay (or should I say neigh)-saying and complaining that it wasn't MY MLP. And, well, what can I say? It's not, but I kinda like it. I'll grant you, I still can't stand Spike. His voice grates on me. Nothing against the voice actor who provides the voice for him. She does a great job. She's just no Charlie Adler.
But I do like the "mane" six. The ponies in this series definitely have more personality than the G1 and G2 ponies I grew up with, with the exception of maybe those in the pilot episode of G1 (Rescue at Midnight Castle).
My favorite pony is Fluttershy.

I think this may have something to do with the fact she is the closest to resembling my generation's MLP with her soft voice and soft colors. And Rainbow Dash is a lot of fun, too. She's the exact opposite of the ponies I grew up with.