Which installment of the Heroes series had the best campaign storyline for you?

I like Heroes 4 more. Why? It's like a culmination of the old world, as if a final chapter. The events of the previous games echo in the plot of the fourth installment. It's as if woven from two pieces of fabric: we see a new plot, but the previous part, the old, lost world, shines through. And besides, when you read the "story" texts, you delve into them, like an interesting book. That's why I like the fourth game: for its touching story.