Ummm, it's a loooong list! I'm a reformed collector and pack rat. I've gotten rid of masses of things that I used to amass. Teddy bears, dolls, wooden pull toys, wooden boxes, a mouse collection, all things hot air balloon, round pins with snarky sayings, costume jewelry, pretty rocks and beach glass, antique glass bottles, fish tanks and the fish to go in them, fabric, gargoyles, fairies, dragons.....well, you get the idea.
I still have bits of most of these collections. I've just winnowed them down to the few very best, most interesting and beautiful pieces. I moved into a very tiny apartment in '94, and my New Year's resolution that year was to stop buying anything just because it was "cute". I did really, really well with it - probably the only resolution I've ever kept that long. I've cut down to buying maybe one or two knickknacks a year since then. (Not that they don't arrive without you spending any money on them, but at least I wasn't contributing to the problem.) Getting rid of what I had accumulated took a long time, but I'm really doing well at that now, too.
Trust me, it's not likely you're going to unclutter everything until there's nothing left at all. Even if you did, someone would give you something that "just looked like you..." and the knickknack count will bounce back to a happy medium!