So I am just wondering...

[Falconaitae]

Rarity, because I like girls with class and style

On purely aesthetical terms I like Lyra and Bon Bon, those Junko Mizuno ponies (especially blue one), in general floral motives on pony bodies, and every pony that involves choice of blue, red, orange and pink or yellow and green. But I can't really choose a favourite one.

[Yurusumaji]

Pinkie Pie. 

If you met me, you'd never know it, but I love the color pink. And I think Pinkie's cutie mark is adorable. I find her antics amusing and I especially loved her in "Swarm of the Century". There's just nothing about her that I don't find adorable and I love every iteration of her.

[NoDivision]

Rarity, because I like girls with class and style

On purely aesthetical terms I like Lyra and Bon Bon, those Junko Mizuno ponies (especially blue one), in general floral motives on pony bodies, and every pony that involves choice of blue, red, orange and pink or yellow and green. But I can't really choose a favourite one.

There is only one Junko Mizuno pony. The others you're referring to are either art ponies or possibly fair or comic con ponies.

[gabumon]

Big Brother Chief.  His pose is Epic.  His colors are great.  Some day I'll have his Hat and Bandana and those are great.   He's just got this "Hero" look to him.

I like Sunburst too, but his pose isn't my favorite.

[invaderhorizongreen]

I really do not have one I love them all but my favorite as a kid was wind whistler sadly I lost her long ago and for the life of me do not remember what happened to her. I recently did get another one that made me happy.

[Tropical_Sunset]

So hard to narrow it down. x_x 

G1: Sugarberry
G2:  Prince Firefly
G3:  Silver Glow
G3.5:  Mrs. Dash
G4: Princess Luna...Though I really like the Princess Cadence toy too. I guess a tie between them right now!

[hathorcat]

Hmmmm....now thats a tough one...

I think I ll have to go with Baby Fifi! [and Chief is my second fav]

[Shenanigans]

My Baby Lucky Leaf from my swap partner, Marigold

[NoPonySpecial]

Character-wise: Fluttershy.
Toy-wise: Baby Glory because we're bestest pony friends ( ), but for design AND nostalgia, I'd say Up Up and Away.

[TrixieStix]

Toy-wise

TEX...... he's so handsome but I don't own him........yet
G2: Sky Skimmer
G3: Marshmellow Coco
G4: Cupcake

[foalpatrol]

It changes from week to week.  Hippity Hop and Thistle Whistle will always be firm favourites, but right now I am loving Shenanigans and 4-Speed!

[ApertureScience]

That "you" tag/filter/thing gets me every time!

G1:  I don't have a current favorite at the moment.  I've kind of been taking a break from it to work on the other generations.
G2:  Sky Skimmer's been getting lots of my love lately, but Wednesday Afternoon Bride is my holy grail.
G3:  Valenshy.  Beautiful color combination in her hair, elegant pose, lacy symbol...
G4:  Trixie!  Love her so much!  And Star Swirl is my grail for this generation.

[Diamond]

good use of the "you" code, by the way! and your signature is stunning! very beautiful!

Thanks, it took me a minute to word it right.  LOL And I can not take credit for that siggie, it is SourdoughStompers handiwork.  I must remember to put her name in there.

Totally enjoying seeing everyone's favorites and the why behind it.

[Ringlets]

I think everyone already knows my faves...        but its fun to read about everyone elses

[DoctorMowinckel]

Right now it's my G4 Fashion Style Rarity 'cause I made her super pretty, and did a print of her that came out awesome. It will likely, and soonly change to one of the winter G3s with their awesome hats.