I was raised in a climate that encouraged reception in the hand, though I would never want to do it now, and it didn’t really feel right back then. Somehow, the idea of being able to take something in my hands, and through my own effort, put it in my mouth, always made me doubt the real presence of God in the Eucharist. It just felt too tangible and physical to be worthy of much respect.
Keep in mind that this was before my close encounter with agnosticism, and my subsequent return to the faith. It wasn’t until much later that I learned the truth about it; that people touching the Eucharist in that manner tended to lose faith in their priests, and in God, because it seemed to diminish the importance of the priesthood.
This is more psychological than doctrinal, but at this point, the church in Europe and North America is in a great deal of chaos, due largely to the loss of faith on the part of so many thousands, who only really attend Holy Mass at Christmas and Easter.
Having returned to the faith, and learning why the sacraments exist, I’ve come to conclude that while reception in the hand may not be forbidden, exactly, reception on the tongue is a form of extraordinary respect for the priest and for God, and if I hesitate to show him extraordinary respect, I need to question the strength of my faith.