I have 2 nieces and 2 nephews.
I like to say that I'm the Best Aunt in the World.
That's me with my nephews (when they were 7 and 10) at Epcot in the picture below.
When my older nephew was in high school, he said that he would like to go back to Disney World, so I took him as a high school graduation present. I think that counts toward the title.
I'm sure there are other people here who would like to claim the title - but the use name was available when I joined, so I took it.