^ I have been wanting fireflies for so long :'^|
I would also like to suggest job-related items. I know a lot of people specifically come to these sites to make fantasy stuff, but I'd love to have the ability to recreate, well, non-fantasy stuff, too.
I want to see things like work vests, polos, work gloves/boots, stuff that shows wear and tear or has dirt/paint on it (and not in a cutesy or overly artistic way, just something that looks like you've been painting houses, tuning up cars, or digging in the garden). Nametags, tools (normal sized ones, that is), and various background items and environments/scenes. Store shelves, registers, offices, desks, repair shops, workshops, shopping carts, tool boxes, briefcases, restaurants, kitchens, construction sites, hospitals... the possibilities are endless!
And not just work/job things, but I'd like to see more real-life items and themes in general. Sure, I can make an avatar that looks like an anime or video game character with ease, but I still can't make one that looks like me.