I suppose the G1 ponies are the most popular ones because these were the ponies of our very own childhood. I wonder how such a survey would look in, say, 2023 or 2033?
Personally, I'm having a hard time deciding between G1 and G3. To me, their faces have such a lovable, slightly melancholic and trusty expression...
Well, I finally decided on G1, I can't say exactly why. It's an e-x-t-r-e-m-e-l-y close match.
I really like the slender and quite elegant G2 body concept, but from the neck upwards... uhm... well, I am just not too fond of their faces. Had they closed mouths, they could maybe be my favourite.
G3.5 - to me: No. NO!
G4... well, I saw the animated series first, so I expected the toys (the brushables, that is) to be more similar to the show characters, who are adorabilissimo. But when I saw the toys, I was quite disappointed. The general lack of quality and creativity saddens me, as it's obvious to me that the toys could be absolutely wonderful with a few small adjustations.