Let's keep civil and constructive.
Here is my answer to the first post. Whether you BH/MH conditions are going to be "added" to your MEB or will be found unfitting really depends on the facts of the case. (I have been involved with many cases where a condition is NEVER mentioned in the MEB or in the medical records that went up with the MEB but were later found unfitting by the PEB. Sometimes, it is a newly discovered condition. Sometimes, a change in diagnosis. And, sometimes (though rare), just the members testimony is enough to show a condition not mentioned before is unfitting). The first step is to seek help for the condition. Also, see if the condition is explicitly listed as requiring an MEB. If it is, then it is an easier argument. However, the most important thing is to disagree with and rebut the MEB if it does not adequately cover your condition.
A comment about this "taking advantage of the system" idea. A few points I would offer for consideration. First, it is the MEB and the military that have the obligation to conduct a COMPLETE exam and to address ALL conditions. Over the past few years, there have been improvements on this point. However, I still get cases where the MEB or a doctor or a PEBLO will state that "Oh, we don't board that condition" (there was a recent post stating that this happened to a member, too). So, as a starting point, a full and accurate evaluation is required to be done by the military. My second point is that I don't think it is taking advantage of the system to go through the system and get awarded a percentage for a condition. That is what the system is for- to address disabilities. If the PEB or the VA correctly denies a rating, well the system has worked. But, when the PEB or the VA incorrectly denies a rating, this is a failure of the system. The process is what is in place and I don't understand how it could be taking advantage to ask a condition be rated. Assuming no failure in the system (a big assumption in some cases), a denial will issue or a rating will be awarded as appropriate.