What is your opinion about Heroes IV?

Night

You missed a whole bunch of bugs, the caravan feature that ruined the game, the daily growth, the inconsistency with the series (the elimination of some races or the mixing of them), and the stupid magic system in which one clearly dominated the other...

Caravans are a great thing! (as mentioned above, for the following reasons);
All the bugs have long been fixed with patches, and Alan has talked about how buggy the universally beloved third game was in other threads; bugs are not a fatal flaw;
Daily growth is a successful/unsuccessful, but sensible addition that changed tactics and strategies;
"Inconsistency with the series" - what does that mean?! Maybe it's because they returned to the traditional - classic - system of six Castles, which appeared in the second game, which is interesting and well-balanced, and which was later destroyed by the "ideologically" absurd nine Castles of the third game and its expansions (what about the Elemental Castle and the fairies with phoenixes in it - nonsense! Although, I don't deny that it was entertaining)? Maybe it's because the fourth game largely repeated the second game in terms of the composition of creatures in the Castles, rather than the third game, which mixed everything up? Oh yes, now the favorite argument of the fans of the third game is "orcs" in the "Chaos" faction - what a horror! But you won't find more obvious mistakes. In terms of "completing" the Castles, the fourth game corresponds well to the true classic - the second game. And it's right that it doesn't just copy it. And the "mixing of races" is in the third game ("demon," "swamp," and "elemental" races are not a pity to eliminate - in order to adhere to the classic scheme).
The "stupid magic system" is better than the complete lack of a coherent system, as was the case in previous games, when you just leveled up wisdom, built a guild, and everything was fine. There is no need to talk about the "elements" of the third game; they did not introduce anything fundamentally new to the system.
"Stupid," by the way, is your "IMHO," which is not always shared