I'm surprised that some people actually like Mass Effect over Dragon Age.
Having finished Dragon Age, I decided to play through Mass Effect again, since its sequel is coming out soon, but I cannot stand playing through it anymore.
The dialogue in Mass Effect is so boring. Virtually everything you select from the left side of the dialogue wheel results in Shepard asking a straight-forward question, without any interesting outcomes, and the phrases you select from the right side of the dialogue wheel rarely match what Shepard actually says. I hate having so little control over my character's actions -- especially in a Bioware game.
At first, When I finished Dragon Age, I wasn't really impressed by its overall quality. I enjoyed it, but I wasn't totally blown away. However, playing Mass Effect again has made me really appreciate the effort that Bioware put forth in developing Dragon Age.