Well, Oblivion's system at least tried to introduce some emergent features into the conversations. Indeed it ended up sounding exceptionally awkward quite often (especially when people have other than neutral attitude), but the system itself was brilliant. In Skyrim and even the Witcher I can give you the exact line that each character will say, especially that fucking asshole landowner in Whiterun. It's only because the dialogues in those games cannot vary in multiple parts that it sounds cohesive. In terms of repetitiveness it is far worse.