I rather like Mr. Ron.
I've heard "Mr. + first name" used as a rather disguised way of displaying a patronizing (or condescending) attitude towards the person addressed in that manner. Maybe it's just a local thing, or maybe it's just me. Anyway, that's how I've
It would depend on who it comes from, how it said and where it is said. In any event, I prefer to not use or hear the "Mr." title, generally speaking. There may be exceptions once in a great while.