I have already done this, mine is the Peruvian Cardinal whose last name I of course can't remember at the moment. I think that we should ALWAYS do this. Maybe as a part of being a Catholic. Adopt a priest to pray for that we pray for as long as they live. Wouldn't that be wonderful?
Is it cardinal Cipriani who held talks with Tupac Amaru terrorists when they held hostages in Japanese embassy?
I have exactly the same feelings - it is so much easier to pray for a particular person, at the same time knowing that others are taking care of the remaining ones!