We actually use 2 density standards:

1:    Extra light: 40%, Light: 60%, Medium light: 80%, Medium: 100%, Medium heavy: 120%, Heavy: 140%

2:   Extra light: 50%, Light: 80%, Medium light: 100%, Medium: 130%, Medium heavy: 150%, Heavy: 180%

With too thick hair it doesn't look natural. And it's impossible to make a natural parting. It will be too tight - a real wiggy look.

Light to medium should be more than enough for most men.   And medium to med heavy for women.

If you are a little bit wiser (older) don't go for too much hair. And choose a lighter color. And let it be possible to see your scalp a little bit.

  Free style, light

If you hade chosen straight back style then you wouldn't be able to show so much of your scalp. Extra light to light is very much ok for straight back style lace pieces.