As a child at Saint Peter's (sic) School in New Brunswick, New Jersey, it was forcibly impressed upon us by the Sisters of Charity whose charges we were (and for whom many of us became crosses, and yeah, Kelly, I'm talking about you, among others) that there was nothing good about Good Friday.
When we were old enough to mentally and emotionally comprehend the New Testament accounts of the Passion of Christ I couldn't imagine a more horrible way to die. As I grew older if not up and learned more of our species' history and track record in dealing with one another, I realized we could, and often did, behave like a life form beyond any Redemption.
Christmas gets all the ink and Easter the lilies and chocolate, but Holy Thursday through the sunrise services of Easter Sunday morning are 'go' time for Christian believers.
The events and circumstances of Good Friday, the sundering of the curtain in the Temple in Jerusalem (what a great word 'sundering ' is when you're in fourth grade; actually, it's still pretty cool), the forgiveness of The Good Thief, the testimony of the Centurion Longinus at the foot of the cross and a hundred and more sidebars, nuances, and obscured by time and telling points on the biblical accounts always seemed to make Good Friday the most important of the days leading to Easter.