WHY would you purchase a FULL FRAME Pentax? (In point format)

I've been using Pentax since my very DSLR-beginnings (together with other camera systems) and seen the hordes of people in this forum swearing by Pentax and then swearing at Pentax about a full frame DSLR. Although the advantages of FF in relation to APS-C has been amply elaborated, I'm not quite sure why the Pentax followers here favour a FF.

Please list in point format the reason(s) you would buy a FF Pentax; so that it is clear to me and to others.

Regards,