A few things... first off...
WHY DIDN'T I SEE THIS BEFORE?!!!?!?!??!?!?! 
Second: for the turrets, can I recommend you increase the diameter of the barrels by 20% or so? They look disproportionatly small to the turret itself.
Third: I agree with GE on one count - I always thought those windows were recessed, not extrusions or on extrusions.
But I think that having the fore-dorsal ( = Top-front for you land-lubbers! Yar!!) "curve" as distinctly angled flat sections is uber-cool.

MAke sure to leave smoothing for that section off!

Fourth: on those hull extrusions that stick up the most, model a reason for the season - give 'em some grilles on their sides or something... or you could just texture their sides with grilles.... whatever. I just like things to look like they have a purpose of some sort.

Fifth: Did I say: :JAW:!!!!!!!
