This is a topic I'm very much interested in as well. I'm a real beginner when it comes to astrology, but in a wider sense it's just another step on my long-lasting interest in gaining greater self-understanding. I have Sun, Mars, Venus and Mercury in Virgo, out of which all but Mars are in the 12th house. Sun, Mars and Venus are in conjunction as well (orb 3...4). As much as I've read and tried to interpret, this is a good load... Of something shady

And in a way, having read all these 12th house descriptions, I do feel that there must be more to it. Or, let me rephrase, I feel that there is something more constructive out of this to me than... Institutions and solitude and what else. Having analyzed my planets, signs, houses and aspects in general, I see a certain structure forming out of the results, but yet fail to see the major structure or meaning of my 12th.