My daughter has a special relationship with my dad, who she affectionally calls "Win". (His middle name is Winfield). She greets him with a wide hug and a sloppy kiss, will run to him when he calls for her in the house and likes it best when she can sit in his lap and have a snack. When we talk about him she calls him, "My Win".
There is something so sweet about watching my own father, who did such a great job raising me, love on my girl. He thinks she is the best thing ever.