Have you tried DA2?
Sure, it's not as great as DA:O, but it's still decent enough as far as RPGs go.
And besides; every DA game is a stand-alone story. Sure you may hear something about one of the previous heroes and even run into some companions from DA:O or other NPCs, but the only thing they have in common storywise is that they are set in the same world - and in the same time period (more or less) for all the current games.
If you haven't tried it, don't just take someone's word on it - according to the vast hordes of the internet SWTOR is just about the worst game ever made, and the devs that made it are devilworshippers given how they are working for the Evil EA.
Yet I take it you're enjoying SWTOR since you're posting here.