As for me, I started a long time ago as a rope fetishist, who then got curious as to how to get more of it into the bedroom.

After a lot of knotwork I found shibari to be a lot more sensual and flowy, and thoroughly fell in love and spent inordinate amounts of time and money to learn it.

Meanwhile, I lost my rope fetish, but seem to have plenty of excuses to use ropes anyway ;)