I wish I could get to the point where my 20 minute works look like this instead of pencil sketches. What tools did you use? And can you think of an estimate of how many hours you put into the use of said tools before you got to this point?
That aside, I like the big glowing holes that imply deploiment ports. One thing a saw on that subject were ports that were further back on the craft's body with rail guns launching the fighters forward. The ports had structures above them and the rail guns, so no clean hit could be placed on the port doors. The ship was called the Acropolis and it was in the game Project Sylpheed for the XBox 360.
Anyway, good job. The lower right one looks menacing.