What is your opinion about Heroes IV?

Heroes of Might and Magic IV is truly a treasure trove of good ideas. I'm annoyed by the castle building system. But the game maps are stunningly beautiful. Call me a pervert, but I think the fourth installment is better than the fifth. I won't play the fifth one until they add snow to the Academy. By the way, about the heroes – my friend took a castle with a bunch of dragons at a relatively low level (around level 10, I think).