I wear my boyfriends three ways, and it depends on the weather:
1. Cropped and rolled (with pumps, ankle-strap pumps, or tapered ankle boots)
2. Long and unrolled (with flat or heeled booties)
3. Long and one roll - hence full length (with pumps, flat or heeled booties)
I can't handle cold ankles, and I am that sensitive. That's why I like the option of the longer length.