Can anyone tell me for sure what the actual mix is at 100% for any of the effects  To me all of the mod effects sound like the mix is more than 50-50 at 100%, on the wet side and the delays obviously are.  For example, that makes sense with a phaser but not the chorus or flanger.  I hate that Line 6 tends to try "dumb" things down instead of telling us exactly what the parameters really mean and what they do.  Much of the time their dumbing down makes things more confusing.  The EQ's are a great example.  There's a Youtube out there about them that was an eye opener for me.  One that was specifically about the HD500's EQ's.

For me it's the chorus's.  I'm looking for a gooey type of chorus that I could always get out of my Digitech gear.  I was really excited to think I might finally be getting that in the HD (being an XT, X3 guy).  No gooey and a bit over the top in my opinion.

+1.  I use the script phaser like this in a patch that I use for reggae rhythm  in a cover set.  The phaser is slightly too dynamic so I mix in some clean signal to reduce the effect and make the tone more focussed.