Nahhh. The idea of IV/EV training is exactly why I quit World of Warcraft - the idea of having to essentially work for hundreds of hours to get a competitive team that is basically only going to end up being exactly the same as other competitive teams is not why I play Pokemon. I don't have the time or will to put in the hours necessary, and I much prefer the idea of using a wide variety of Pokemon because I like them, rather than using only a select few because they are the "best."
I do understand IVs and EVs, and I'm not going to condemn those who do put in the hours, but the closest I get to competitive Pokemon battling is occasionally breeding for a helpful nature (and I do mean occasionally). I find it much more enjoyable and compelling to fill my Pokedex, even if I live in England and Pokemon like Celebi, Manaphy, Shaymin, Arceus, Darkrai and the rest are all infuriatingly unobtainable for me.