The smell of the box.
This. I love the smell of eletronics as well, like new headphones plastic (got some Grado i60s the other day, hyped out on that), speakers, CDs, book shelving units (i have 6 mediac/book sheleves in my room, and enjoyed putting them all together). New shoe smells are nice, but only if not riddled with the stench of other people that may have tried them on.
Also, Starmongoose, having brazillian in me, I can vouche that we do walk around with kawaii pigs (not really, but i'd like think that's one of our stereotypes ;) ).