What I personally hate is how cable type/speeds aren't usually advertised. I've got a dozen or so USB-C 2.0 cables that feel useless for anything but power, and only a couple 3.0 cables that continually get lost and need replacing. The connector itself is fantastic, USB-A and USB-B have needed replacing for a long time (especially since 3.0), but the implementation has been a disaster by any measurable margin.