actually, i like the idea that we'll see a bit of Earth this time around. all we've gotten in the past two games is a couple of codex references as to what Earth is like and nothing more. the other thing that i like is the idea that we'll see another epic battle at the end of ME3. missed that in the second one. (note: and by epic, i mean two fleets engaging in a battle. not two ships and a whacked out Reaper hatchery.)
all in all, its exciting.
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind