Well DA is kind of the antithesis to FO3 and TES. While in FO3 and TES you're in an open world and need to make your own story, DA is storydriven, i.e. you have less freedom and the world is much more compact, every spot is filled with stories. Also it is pause and play. You control a full group in DA, so you have to pause in battles to be able to control the actions of all your party members. You can automatize DA to an extend, but there are limits to what can be done, and for optimal control you really need to micromanage every action of your group. About quality, all I can say there is that DA has a very good story, good characters, and good quests. I dont know why FO3 bored you, though, so that might not help.