I can say that a game is good if, when I turn on the PC, I reach for its shortcut, and after finishing the playthrough, I immediately, without interruption, want to start the second one. This happened with the Witcher and Mass effect series, with DOS and Divinity Dragon Commander, with atom RPG (a game like old fallout).
But I've played thousands of hours in DA Origins, although I complete it in an average of 20.
Tactical but action-packed combat where you need to control your entire squad to win (or customize the AI). Multiplayer is not built in.
A well-thought-out world (in the codex you can learn about the history, religion and culture of Ferelden and other countries), an epic plot with many decisions (and consequences).
Colorful, gradually revealing personalities of the partners.