I've always found the idea of when you die, you come back as some sort of an animal to remind your family you love them to be really cute. My mum reckons her mother comes back as butterflies and rainbow lorikeets, and her father comes back as bird feathers and also rainbow lorikeets.
When I die, I'll come back to the ones I love as dragonflies, all colours, all sizes, even as damselflies. I mean, it's cute that when my friends see dragonflies they already think of me, so I don't see why I wouldn't come back as one (or many).
It doesn't even have to be an animal, sometimes it's music, flowers, and other symbolic things.