I much prefer a Mass Effect 2 style trailer where they stick with in game footage. I suppose live action can be done right and might even appeal to non-gamers. The problem is though that this type of trailer doesn't necessarily show what makes Mass Effect great; it makes it seem like some generic action game.
Launch trailer for ME2 was one of the best game trailers ever. This trailer though, this is shit. The entire marketing campaign is just a poor copy of those used by other blockbuster titles. At this rate the ME3 launch trailer will have Eminem rapping over the top of it.
I'm really turned off by this whole marketing campaign. I expect this for Halo, but not Mass Effect. ME is not about some super dude with a gun saving the universe, because the aliens killed a little girl.