What is your opinion about Heroes IV?

Hello everyone. I'm new here, but I've been playing Heroes for about 6 years, albeit intermittently. Nevertheless, for me, each new installment and expansion pack is always a joyful event. At first, I was disappointed with HoMM4, but then I simply accepted it... and that's it. There's something heroic about it. Not in the traditional sense (there's much less of it than expected), but something entirely new. But there are also things that would definitely improve the 3rd installment.
I'm not very familiar with HoMM 5 - my computer is not powerful enough. And... just like with the 4th installment, I still can't get used to it.