I'm a long time MMO gamer, starting with UO in 1995. I roleplay in MMOs - I love "becoming" my character. I also love BioWare single-player RPGs. I am in love with John Shepard from Mass Effect. No, I am not ashamed of that fact.
How I got started with The Sims is because one of the writers of Dragon Age posted that she had made a Sims 3 household with the characters she was working on (this was before release) and some funny stuff happened.
Welcome to the forum, Cedia!
I didn't realize one of the Dragon Age writers played Sims 3! Do you happen to remember which one?
Since you're a fan of Bioware, have you tried
The Old Republic? I played it for a few months, and they had some very cool stories. (I particularly like the Agent stories, though I liked them all) There isn't a free trial that I'm aware of, (though I think it's going Free to Play) but if you have the money, it's worth trying out, if you're interested in the story aspect of MMOs.