Well I guess I'll start
I love all the different functions you have on this site. There's close to no limitation in terms of customization. No image upload limit, sorting and so on. I've tried refsheet before and it was just too limited (still not a bad site though)
Organization. Having folders, subfolders, descriptions
While the forum is not all happy and nice, a big amount are awesome peeps I always see active on here. I also love the art threads a lot.
Sharing characters is fast and simple by simply posting IC.