Which faction do you like the most in Heroes of Might and Magic IV?

For Haven, the units aren't slow; the Djinn, Dragons, and Golems, along with the hero, have very fast movement speed.

It all depends on what speed is considered good. If you think that a speed of 24 for a Djinn is good, then that's true for you. Dragons and Golems are among the slowest level 4 creatures (I didn't say the slowest), and without Djinn, they are very weak (let's not bring up examples with neutral creatures), so my statements are not unfounded.
P.S. All of the above applies to playing against a human.

Sincerely, LeSHiJ-MaX