Pimppeter2 said:
The ability to take control of party members like in Dragon Age.
I'm going to have to disagree with you on this one quite fiercely, in principle and based on practice.
First, Mass Effect and DA:O come from quite different traditions when it comes to combat. DA:O is a descendant of the party-based D&D games that Bioware started off making and thus more control over party-members is a given. Mass Effect, on the other hand, is more of a squad-based shooter (the only one I can remember playing is Star Wars: Republic Commando) where the point is that
you are the main character. It's a different sort of experience with a focus on your personal connection with the main character, rather than the party as a group. Given the focus on a single character, it's also more realistic.
Second, in practice, I think DA:O suffered from the party based system because it disconnected you from the main character. On my first playthrough, I had to micromanage Morrigan and Wynne a lot more than my main character (a warrior) and thus I came to be more connected to those two than my Cousland. This was compounded by the fact that the main character isn't voiced, meaning you don't have an aural link that ties in with their personality. Because I was manually controlling my mages so often, they were often the effective 'leader' of my party and this came to undermine the special role your own creation is supposed to have.