My guess is that the Reapers target Earth first, instead of the Citadel, because people from Earth were the only ones, recently, to destroy a Reaper. We've also messed up all their other plans. That would make Earth a big blip on the radar. They aren't solely going after Earth, we are just the biggest threat to take out before they get to every other race.
As for Freddie Prinze Jr., he was good on 24 and nothing can be worse than the abomination known as Wing Commander.
As for Freddie Prinze Jr., he was good on 24 and nothing can be worse than the abomination known as Wing Commander.