I've never really given much thought to why I shouldn't be a Methodist. I've never even been to a Methodist service before, but you see Methodist churches all over the place. And they're United, right? So, I don't see how it could be a bad idea.
I think all this stress on preserving the ancient faith is a bunch of fundamentalist malarkey. Just because the apostles were uneducated and illiterate and Jewish literalists, incapable of interpretation, incapable of living the spirit of Christ. Who cares if the apostles established bishops in their stead? History has shown that the farther an organization proceeds from its founder, the less it resembles the original aims and structure of its founder: look at the Franciscans, the Lutherans, even the Muslims. Christ didn't come to establish a church or institute a series of sacraments; such a view is presentist and anachronistic. That one formed around his person and his teachings is obvious, but we call such phenomenon a "cult." The apostles were frightened, zealous, marginalized Jews no different that the radical mentality of suicide bombers in the Mid East today, willing to be martyred for some delusion.