Well first of all I love these type of discussions. I am always trying to pack lighter than the time before. I am fortunate not to have to pack for any kids or dh only me! So I believe I have an advantage right there.
Also-NO cotton NO jeans NO sweatshirts. These things add weight and take too long to dry if you are doing laundry in your room.
Having said that-WDW is different because we will have the washers and dryers. So I MIGHT bring one pair of lightwt jeans.
I'm going in Dec for 10 days. But I would pack the same thing for 2 weeks to 1 year. Here is my list:
1 pair convertible pants
1 pair other pants
1 pair dressy pants (I have to go to V&A)
1 pair silk long underwear
1 pair pjs (or use above, haven't decided yet)
1 skort (maybe)
1 dress (highly unlikely but may need it for V&A)
1 short sleeved merino t-shirt
1 short sleeved technical t-shirt
1 long sleeved merino shirt
1 fleece
1 rain jacket
3 pairs of wool socks
2 bras
3 underwear (ex officio)
2 pairs of black shoes-one sandals and one pair clarks privos
I think thats it.
For toiletries-
Dr. Bronner's soap=laundry soap, shampoo, face and body soap
toothpaste toothbrush disposable razor.
minimal makeup (maybe)
I think when I just went in May my bag weighed 15lb and it's 3lb empty.
This time I'm aiming for 10lb max!
I'm getting the Deuter Futura 28 bag which is 1708 cubic inches and I will compress the clothing and also compartementalize everything.
Oh yes, small camera
Prescription medicine.
That's it.
I know what you all are thinking:


Maybe

? but remember I have an unfair advantage of no kids and no spouse.