Without question I do. And there are certain aspects of Catholic theology and practice that I find superior to those of my own faith. Catholocism, despite all of its dogma and official trappings, remains more contemplative on the whole, I believe, than most Protestant denominations. I find the spiritual experience of mass to be far more reverent and do attend on occasions.
That said, I can’t accept the Catholic Church and all of its beliefs as a whole, so I’d have a hard time converting. There are a few lagging issues that keep me where I am as a Presbyterian.
But yes, Catholics are absolutely 100% Christian. And any Christian who would limit the words of John 3:16 more than they are in a literal translation is someone who I have far greater theological differences with than I’ve ever had with the Catholic Church.