I'm glad to see there's no love for the new forms, which suck and make no sense. It's illogical that Eevee now has a Leaf evolution, while Red/Blue or Gold/Silver told you that it has no effect on Eevee. I know it doesn't evolve by Leaf stone, but why not just add it to the original games with a decent name?
Voted for Espeon, because it has good special attack, doesn't use up a rare elemental stone, and you can teach it Surf, Thunderbolt and Ice Beam. Takes crazy breeding, but I should know. In Gold, I bred my Eevee with a shiny Ditto until I had a team of 6 shinies, one of each Eevee evolution and the original Eevee.