Because my Pikachu is a female Pikachu with that heart shaped tail, what makes it more special is that it's the first Pokemon I encountered in the forest, and it's pretty rare to find Pikachu in that forest :)
But the bad part is that, she has an adamant nature but no Volt Tackle, so I wanted her to know Volt Tackle, and she would be really awesome in battles. But either way, I still love her :)