Best ever for me is Frank Hondo Howard. He will hold court and tell stories and treat each person like a personal friend. Class act all the way. Brooks Robinson is up there as well.
My modern day player is Roberto Alomar who I asked for an autograph in Detroit when he got his 2000th hit. He was on the team bus and told me to come back tomorrow - (he had gotten beaned in the head that night). Sure enough, he saw me in the crowd the next day and waved me down to the front run to sign for me.