Quoted By:
Jolteon>>Vaporeon>>Umbreon>Espeon>>Leafeon>Glaceon>>>>Flareon
It's not really fair to the other Eeveelutions, though. Jolteon is my absolute favorite pokemon.
As far as Sylveon goes, I judge a poke by all aspects of it, not just physical representation, so I'm not about to make judgements on only a fraction of a pokemon in my eyes.