Every week? Actually nothing. Occasionally? I like Nathria and Ny’alotha enough to do them often. They’re both easy to solo on mythic nowadays, provided you can heal Kael’thas.
Used to do Amirdrassil semi-often as the set pieces are kind of cool, actually.
I thought I’d do much more once transmog was easier to obtain, like for example doing the legion ones for their lovely sets, yet I’ve only done 2 Nathria runs in the first week of the war within and one uldir as a lvl 50 because it feels awesome to do your level raids by yourself. There’s so much else I can do that transmog or mounts are not really a priority.
Farming this since I came back more than a year ago, not every week but most of them in Mythic, LFR and with other alts in LFR only (and with coins every week to give another go at it).