Love the series, rewatched more than 'lots'.
...BUT... there are two criticisms:
- The lack of character development. The obvious one is the Rodney McKay character... perpetually arrogant and hysterical coward incapable of mastering basic weapons skills. No capacity for self-reflection and awareness... after 2 1/2 seasons I found the character irksome... I put that down to poor writing and direction. Hewlett does a great job given the character constraints.
- The relentless moralising by the Dr Beckett character ("I have sworn an oath and have a duty to do no harm").
- ...and similar criticism of the Tayla and Weir characters.
There is no 'edginess' developing as impending doom approaches although Flanigan does a great job as Shepard as does Momoa as Ronan (a glimpse of what he has to offer).
The last season finishes with a whimper.
Overall, loved the series, but it could have gone for another 1-3 seasons if the writing had more depth.