The practice of receiving Communion in the hand has been an ongoing controversy amongst Catholics. Indeed, many traditionally minded Catholics sometimes support their opposition with quotes from private revelations claiming those who received communion that way undergo special punishments in purgatory. I don't know what I think about that.
However, Fr. Zuhlsdorf has twice posted on the subject of Communion in the hand in the past several days, with the inclusion of documentary photos of the effects. The photos are compelling arguments against the practice. (You will immediately notice how the hands turned black... KIDDING! I'm so kidding.).
Despite the fact that the practice is approved by most of the Bishops of this country, I prefer to receive on the tongue while kneeling - although it is not always easy to do in some parishes.
Art: St. Pascal Baylon - Mexican retablo