Wow, you have built up a fabulous Mulberry collection over the years
Perhaps you are more of a collector than I am? That's ok too

I didn't want to keep any bags I didn't use, much as I loved them (or the thought of them).
For me the process was a quick one. Usually I am rational and slow at making decisions, but I think it got to the point where once I decided I wanted fewer bags in my life, I just wanted to get on with it. At the end of it, I now feel liberated and lighter, and am enjoying the bags I kept. It's difficult to descibe how positive it was.
With the great advice on this thread, I ended up with a much better sense of what bags work for me and fit my style / lifestyle. So much so that I am eyeing 2 new bags in the next sales...

But I'm in no rush to buy, and I know these bags will be used, because they will fill a "hole" in my collection. (Plus I'm only using money I make from selling my other bags, so fingers crossed).
The best advice for me was::
- move on any bags that are too heavy
- move on any bags that annoyed me (too heavy, too fiddly, to tricky to get in and out of, hand carry only, etc.:
Which I suppose really boils down to getting rid of the bags I would descibe as: "I love her, BUT..."
Good luck in your decision making, and remember we are here to help