To me a good game is a good game, I have high hopes for both Witcher and Dragon Age, what excites me most by far with DA is they are using the Frostbite engine, this will be a first in Bioware history having an engine that doesn't need to load a new area ever couple city blocks. It's hard for me to get a great sense of adventure when the areas are small and the loads are long. If they nail the tactics and their action method is as good as DA2 (no matter how many people want to pan DA2, there are a lot of people that never paused it and played it as an action game) if they nail both sides, there is going to be a lot of happy players.
How high has D:OS raised the bar for Wasteland 2? Torment? & Pillars? There is your competition, having mods and coop are huge beni's to D:OS.