Favorite Eeveelution

All of them. No? Fine, Umbreon. A total beast in Gen III, though I never got to use one afterwards. Those defense stats <3

I always liked Glaceon. A little slow, but a very elegant design, neat haircut, decent stats and ice type is pretty chill /lololol.

Umbreon (cuddliest imo) and Glaceon (favorite design).
I currently have an Umbreon on my X team, but Vaporeon would probably be the eeveelution I've used most throughout the years.

Mine are Vaporeon (when's the PokeBank gonna be available again so I can transfer mine!?) and Sylveon.

Stuck between Umbreon and Espeon, especially because I fell in love with them playing Pokemon Colosseum. They were just so cool :3

My favourite is Jolteon! :)

It's very hard to choose, because I have no complaints over how they all look. My favorite and most frequently used has to be Jolteon.

My favourite Eeveelution is Umbreon. The sole reason being that it's a dark type and dark types are one of my favourite types of Pokemon.

Eevee Umbreon. I never used an eeveelution until Silver, and Umbreon's shiny looks amazing too.

I hope we get a poison one next generation

I think my absolute favorite Eeveelution is Vaporeon, has always been my Number Two Pokemon right after Dragonite. I love the aquatic look, the coloring, the sleekness, and he looks so wise. Umbreon would be my easy follow up.

Vaporeon. It has a mermaid tail, which is so neat. Also aside from looks, it can take quite a few hits, and has a pretty great moveset

My favorite has to be Umbreon. It's superb in competitive battling and has the best shiny sprite of almost all pokemon.

Glaceon. It's elegant looking, and a very versatile ice type. I love the way it evolves too. Nature taking over instead of stones seems like a nicer way to evolve in my opinion

Glaceon. I love it's design, and being a steady ice type. It's a gread addition to the already great line up

Umbreon is my favorite Eeveelution by far. It's black, and has cool yellow glow in the dark rings on its forehead, tail, and legs. Dark and Ghost type are by far my most favorite types, and if Nintendo happened to make a Ghost Eeveelution I would probably die.

Flareon! So fluffy and cute.. it's always been one of my favorites. But like others, I do love them all. Ranking-wise it'd be Flareon first and probably Leafeon second though. :3

Pretty hard for me to answer so specifically, as I like 'em all-but the ones I like most are Vaporeon (cute with the mermaid tail), Flareon (looks so warm and cuddly), and Sylveon (I love those feeler 'ribbons' protruding from its body, and its bows especially suit it to be a Fairy-type.)

Glaceon for me! It looks so simple and elegant. <3