I liked LoGH, but it did have a lot of wacky premises that you had to accept.
- The "Space German Empire".
- The galaxy being conveniently divided in two with only two chokepoints.
- The fact that they don't seem to have the high technology of metal detectors.
- The zephyr particles making ax combat the main fighting style for the space marines.
- The planetary populations given are incredibly low considering the sizes of the fleets they need to support.
I could go on.