To weigh in on the whole rpg thing.
I played this a few versions back, and remember being stunned by how impressive the animations were (all animations, not just the sex), and how beautiful the character models were.
It had me thinking, "when the developer finally gets around to plot and progression, this will become the best porn game I've ever played!"
So, I keep watching the change logs, waiting for that aspect. I give full credit for the sandbox that exists. That couldn't have been easy. It's clear that a lot of pain and devotion went into this.
However, the thing that'll make me download another version is some gameplay. Some plot or purpose