Hi maybe someone will have answer for my question: Can i trasfer decision from W2 on Steam to W3 on Gog?

Yes. Saved games are stored in documents, and should be identical, assuming identical installations regarding versions, DLCs etc.

Hickory is correct.

Also, you can simply choose identical actions from your previous Assassin of Kings playthrough. It's no different from loading the save states. Frankly, certain decisions from AoK that felt right at the time I played it wound up disallowing a few very fun quest lines in The Wild Hunt. So it is in my opinion best to ensure you are given all possible quests stemming from Assassin of Kings if you want to experience all the content The Wild Hunt has to offer.

Wrooooooong. :P You can't get the tattoo this way. :)

You can but advantages (if any) are minor. Big disadvantage is bug (at least one) during transfer for NG+... Letho was spared by me in Witcher 2 but after old save game transfer he was "absent". Something what looks like minor quest could be huge advantage later in the game.

The question was about transferring decisions from Assassin of Kings, not tattoos. :-)

This is actually no bug. The problem here is, that you have to import the very last _autosave_ made by the game, not the last save you made manually. The game ends after confronting Letho in W2 and you can't save anymore, thus you have to import the autosave the game makes after this, because then the game pretty much cuts to the ending credits. If you do not import the last autosave, this decision isn't included and the default setting is used, which is that Letho is dead.

In all honesty, CDP should have patched Witcher 2, so it would create a final savegame that would say "IMPORT THIS!!!" and not let it to players to figure something out that is confusing. DUDE - having this tattoo or not IS a decision. :P

If you count having a few drinks with Ves and a couple of Blue Stripes, getting pissed and ending up half naked at the docks the next morning with a tattoo a 'decision', maybe.

Well getting it removed or not is one I suppose

Technically, everything you do in game in a decision. What the OP meant with his question were centrifugal story decisions that effect the outcome of major story arcs and significant characters.

But I am sure you know this and are just messing around :) It was one of the most memorable moments of Chapter 1 for me. There were a lot of seriously hard to forget events from Flotsam depending on your choices though. I played through that game four and a half times in a row to see everything.

Seeing it all purely and without using guides was the best decision I ever made for playing a game like Assassin of Kings. It became my all time favorite game as well as the one I respect more than all the others. Except for Chrono Trigger and [maybe] Final Fantasy Tactics.

I think all three chapters are fantastically written. Flotsam does such a great job of introducing you to the new game engine, characters, and the general setting of The Witcher 2. The Witcher 3's Velen doesn't quite give the same amount of brilliant shine to the game it's representing in it's early hours. Not until Novigrad do you really become immersed in the world and for some people it isn't until Skellige.