In my opinion, most leaders are predictable because players like pure archetypes and synergy (not to mention netdecking) more than catching your opponent by surprise. I got quite a few decks that although might not be the best, they're way more fun than the same ol' archetypes:
Emhyr - Spy? Mill? Nah, Resilience
Morvran - Reveal? Nah, Witcher (mixed with a bit of reveal i admit)
Calveit - Spy? Soldier? Nope, Deck Control (its not mill, it's checking your opponent's deck and messing with it)
Eredin - Weather? Wild Hunt? Relict
Dagon - Weather? Hybrid? Dragons, cuz why not?
Although i must admit my SK decks are pretty much the archetypes of self-damage, damage and discard...
Emhyr - Spy? Mill? Nah, Resilience
Morvran - Reveal? Nah, Witcher (mixed with a bit of reveal i admit)
Calveit - Spy? Soldier? Nope, Deck Control (its not mill, it's checking your opponent's deck and messing with it)
Eredin - Weather? Wild Hunt? Relict
Dagon - Weather? Hybrid? Dragons, cuz why not?
Although i must admit my SK decks are pretty much the archetypes of self-damage, damage and discard...