Zloth
I smell a... wumpus!?
I wouldn't say that at all! TW1's areas are far smaller (I think it used Neverwinter Night 2's engine, didn't it?) but it's still the same basic formula you see in most RPGs.TW3 is a completely different game.
Pladio, I'm not really sure what you're after. These are computer RPGs, after all. The Witcher games are good at giving you choices (Witcher 2 has a huge divide depending on choice) but there's only going to be one overall story. If you really want to have a say in the overall story, you need to play pen & paper games with a live game master that can make things up as s/he goes along. That's how it's always been. You aren't going to play Baldur's Gate and find some alternate main quest that never takes you near the city of Baldur's Gate, for instance.