Beauty is often in the eye of the beholder, so, hard to define. We have published a number of guidance documents that attempt to define the relative importance of views and they are:

Guidance on Identifying and Grading Views and Viewpoints

Identification of Key Views To and From the Malvern Hills AONB Main Document
Main document
Key Views Plans (see main document for details)
Key Views Appendices 1,2,4,5,6,7 and 8
Key Views Appendix 3 Photo sheets (see App. 1 and 2 for details)