Have done the work to cover all of Google's requirements, but every time I resubmit, it doesn't get accepted and they don't provide any valid reasons.
I've never experienced Google not giving *any* reason, typically they give a range or number of reasons that could have possibly triggered a disapproval.
Do you have any other insights?
It probably has a lot to do with you being new. Google looks at how long you've been around, doing what you are doing.
Their fear is that you post a blog, get approved, and 4 days later become a porn site.
It would help if you disclosed the type of site you're running. Can you post the URL?