Lacrymas, you said that D:OS1 was no RPG because your interaction with other chars is not based on your char (stats, skills). In that case, up to 90% of the games we talk about (in a forum about a supposed to be RPG ) are not RPGs at all (like BG1+2).
At some point I defined RPG as stat based world interaction. I admid that I was thinking mostly about combat mechanics, though I did not say it.
Yeah, *technically* they aren't, but like I said, both approaches are valid. There was a big hoo-haa over what constitutes a "true" RPG around 10-15 years ago. It all came down to menu-driven combat though. One is Role-playing RPG (confusing, I know, that's why it's a stupid name) and the other one is Self-insertion RPG. The Fallouts, Planescape Torment, Age of Decadence, Arcanum, the KotORs and, arguably, NWN2 (it's a stretch though) are Role-playing RPGs, while D:OS, DivDiv, Baldur's Gate, DA:O etc. are self-insertion RPGs. DA:O has Persuade but it's token. VtMB, Deus Ex, System Shock 2 are action-RPGs, while the Witchers are action games with RPG elements.