How many apples a day is too many?

My boyfriend and I are big Apple heads. I usually eat one a day. Sometimes he eats 3-4 a day. He IS a pretty big sweet tooth and I have helped him curb his habit for candy and slushies so I mean 3-4 apples can't be that bad? However, sometimes I wish he didn't as we are always going to the store to get more apples!

Anyways our favourites are Honeycrisp, Cosmic Crisp, Envy right now. What are your favourites? :)