I would have to say Sylveon.Wrecks dragon teams like a boss.

My favorite Eevee Evolution would have to go to Flareon.

Is Umbreon an Eevee evolution? If so, probably Umbreon, only becuase I made somebody an Umbreon profile layout once.

I adore eevee and its many evolutions but if I had to pick one it'd be glaceon. I love the look of it, and plus its an ice type!

I would have to say that I like Glaceon solely for its design, as for actually using one, it is okay with its high special attack potential, and a decent eevee evolution overall. 

As for the others, I like Umbreon and Espeon as well as Sylveon which is new for the 6th gen for those of you who don't know. Umbreon is just bulky when it comes to Hp and special attack and defense while Espeon is just a cool psychic with a decent movepool. As for Sylveon, if you train one correctly, it can be a force to be reckoned with, it has high hp and if you train it well enough, it can be a special defense tank....altogether it can be a tough pokemon to take out with its bulkiness and typing which makes it my favorite of the eevee evolutions. 

Espeon, because it looks cool and it is an amazing sweeper, with high sp attack and speed. Its a bit of a glass cannon though.

Without a doubt Espeon and Umbreon.

There are a lot of reasons why, firstly the 2nd generation of pokemon was the one I started with and when I played I liked to experiment a lot leading to me using both Espeon and Umbreon and I liking using both. I think what really made me more attached to them then other eeveelutions is Pokemon Colosseum. It used to be my favorite gamecube game back before I even had a computer or Internet and I pretty much went through the game only using Espeon and Umbreon and destroying everything in my path. They were the ideal team being polar opposites Espeon being a sweeper and Umbreon being a tank. I tend to have a hard time using one of them without using the other thus meaning I'd usually work them both into the same team if I'm using them.

As for the other eeveelutions there's not really any that I hate but the only ones that I really like are those two.

No love for flareon <3? It makes me sad, he gets flare blitz that every one's been whining for since Gen 4, and everyone hates him more ;( is there no pleasing you guys? But flareon just looks like a cuddly eevee that can shoot fire, fire is much cooler than water or fairy or grass. #giveflareonlove

Oh this is hard for me. I could argue on many different terms to be honest.

I've always loved each eeveelution design, but for some reason i have a fondness of Electric, Dragon, Fire and Dark types. So for favorite it is a three way tie between Flareon, Jolteon and Umbreon, but each with their own reason

Umbreon - The only eeveelution i've actually had on a main team of mine, aka my Pokemon White 2 game. Although i'm not much of a defensive person, this pokemon is an absolute tank when battling i must say. It has high stats in both defensive region and not a bad attack. This is kinda the pokemon i rely on when i need to take a few hits without fainting when i go all out and fail miserably.

Jolteon and Flareon - I mostly love these for design since ive never actually made a team with them. But when i say i love attack and speed, i mean it, and this is exactly what i love about these two.

It's really hard to just pick one or two of the eeveelutions, then again i love eeveelutions if you cannot tell by my profile background In all honestly, i feel like everyone's favorite depends on their main strategy in pokemon. Whether it be speed, special, attack, defensive or just well rounded.

my favorite eeveelution would be in fact umbreon. that thing wins with the power of friendship for goodness' sake. and if that wasnt all, shinys look like a blue moon. it also kicks physic butt so hard. it also can learn physic to take out those pesky fighting types. so yeah, not only is it my favorite eeveelution, it is also one of my favorites all together.

My favorite Eeveelution would be Umbreon. It looks cool, it's good against Psychic and Ghost-types, and can learn some good moves.

My favorite Eeveelution would have to be Leafeon because I think it has a decent moveset as well as a cute sprite.

vizzy900 : My favorite Eevee evolution is Jolteon :3!! He can zap Vaporeon and he can be normal damaged by Flareon. Not an Eevee evolution is stronger than Jolteon !!

My favourite Eevee evolution is Flareon because it is cute and I like fire type Pokémon the most.

I think that Jolteon and Umbreon are also cool Eevee evolutions.

My favorite Eevee evolution would be Leafeon because its one of my favorite types

Like I have said before I always liked dark types so umbreon is a favorite of mine but
 I also really like vaporeon and eevee itself

My favorite Eevee evolution would have to be Umbreon. It has a cool design, cool name, good moves and also pretty good stats in general.  It has high physical and special defense, so it would be a good tank for damage.  Just make sure to watch out for those pesky bug and fighting types, they can really do a number on Umbreon.  So just make sure to keep that in mind and try out Umbreon!  Maybe you'll find out that you actually like it.