G1 as it has the most variety and I love the look of the ponies.

I love the full-on 80s vibe.  I'd love to have her one day.

G1, first because they are what I grew up with and second because of all the variety.  I also like how they look more like actual ponies than they get as time goes on.

I personally like the unicorns looking more like traditional unicorns.  So yes to the cloven hooves and lions tails for me!  I also enjoy the kirin, sea ponies, hippogriffs, etc that G4 introduced, so I would like to see those in G5 as well.

However, I HATE the mohawks for the boys.  G1 boy ponies were perfect in my opinion.
I also do not want another Core 7, Mane 6, whatever they want to call it.  I can only have so many sets of the same ponies before I go mad.  Variety is the spice of life after all!
If the ponies could be closer in size to the G1/G3 toys I would enjoy that greatly.  I don't mind a few of the lines being smaller, but I want the main line to be larger.
And if I can only get one wish, I want the symbols to be on both sides.  Please, Hasbro, just give me that!

These are great! Thanks for sharing.

G4 Rarity with royal purple body and white mane/tail would be right up my alley!

Wow these are perfect!  I will totally be buying a couple after next pay-day!

I would love to see natural colours/patterns on MLP.  They could always add streaks of colour in the mane or tail if they are concerned that natural colours would be too "blah".