I'll admit that this one is based more off of the side games Colosseum and XD: Gale of Darkness. As much as I love the Eeveelutions I don't typically use them in main series playthroughs. However, in those 2 side games I listed above I've almost always chosen Espeon. The Psychic type is one of my favorites and Espeon is a big reason for that, it has clutched out more matches than I can even begin to explain and also looks incredible. This thing is VERY high on my list of Pokemon I want to use in a full main series playthrough someday.