Help me choose what I want.

What cruelty!!!!!!!!!!!!!!!!!!!!!!!!

What a tangent! Hehe, just kidding;

I suggest you check out my useful links; there's a lot of interesting stuff there.
And in general, the versions that are popular now:
4.0 complete (platinum edition):
combines RoE, AB, and SoD; compatible with SoD 3.2 and has the widest distribution on this portal.
SoD (The Shadow of Death) 3.2:
patch 3.2 allows you to play with platinum users and fixes all bugs (glitches that dishonest people could take advantage of)
WoG 3.58f (In the Wake of Gods):
unofficial patch (starts from 3.5), currently the latest. Many enhancements, but it's not quite Heroes 3 anymore (in my opinion). Not very popular, but necessary when installing TE
TE 1.03q (Tournament Edition):
this is almost SoD, but the interface has been significantly improved, making life much easier for online players. But (again, my opinion) the game balance has been changed, many things are not in their place, and I don't like it.
But there are still quite a few people playing on TE.

You don't even need to look at the other versions (AB, RoE, WoG3.51 - 3.57, SoD 3.0 and 3.1) - it's almost impossible to find partners for them.
These are all the main versions of Heroes.
From an economic point of view, it is best to have the SoD disc, as you can make almost everything from it.
From a comfort point of view, 4.0 is the best - Russian text in the chat, you can see the amount of mana of the enemy in battle (which you can't do in SoD), and there are a few other minor things....