Hi Scott,
I agree with the others' feedback.
Here are my suggestions:
You doors are cool, but maybe they are too simple and have a "boring" shape/outline (simple rectangle). Try to make them more interesting by breaking the shape with angles.
Same idea for the details of the inside of the doors. Instead of being horizontal, the plating can be tilted and mixed with crazy shapes at different angles, especially if you want to convey the feeling of dark and apocalyptic (read: chaos).
The handles should follow the same design. Maybe bend them and mix them with curved or angled bars.
I have attached some samples of sci-fi doors I did in the past.
Hope these helps. I look forward to see more assets.
Cheers!
_KN
sci_fi_doors_samples.jpg