Terry Pratchett put it best.

Kink is adding some horseraddish to your beef sandwich. Fetish is adding so much you don’t even notice the beef has fallen out.

For me? Rogue Trader. Maybe it got better but after sinking a lot of time into it, what I found was that you’d get to a certain point and after that the game fell apart. Each patch pushed the point back, but it never fully went away.