Well, it goes against the conventional wisdom as expressed by various "successful" story hour authors, but I lean towards longish updates (8 to 14 pages in word) about every three weeks (though lately I have been bad)).
The thing is I like to end installments on cliff-hangers, or right after a SHOCKING REVELATION, etc. . . to leave the readers hanging - so sometimes I need to keep writing til I reach one of those points - or at the end of the session in question.
When reading other story hours, I would like them about every 2 weeks, but for them to have substantial length to feel satisfied - so I am willing to accept one per month.
Right now the only one I am regularly reading is Sagiro's - but I hope to go back and read Old One's from the beginning again and finally catch up.