There's an ongoing discussion in the comment boxes of this post. The dialog begins with Lito pointing out something wrong with the question posed by Jeremiah:
"Given my Calvinist distinctives, which church would have claimed me as one of their own?"
It all goes downhill from there. :-)
There is an obviously large difference between the Catholic understanding of "the Church" and that of Lutherans (and Evangelicals) -- Lito is a Lutheran. The Coming Home Network has an online journal with good contributions from various converts to Catholicism, which is a good place to start with regards to the Catholic position, in light of the authors' previously held non-Catholic perspectives.
And the thoughtful visitor may wish to join the discussion by leaving comments.