Hi, Astrid. Minderwiz, Isthmus, Paradoxx and Dadsnook are really the people to ask about that. I'm just a duffer when it comes to astrology. As for transiting Saturn's effect on your chart, it depends on what planets or angles he hits. For instance -- and this is extreme -- when Saturn squared my natal Saturn, my mom died. However, at the time, Uranus was also hitting my MC/IC axis, and my Moon/Venus/Neptune t-square. It usually takes big combos of transits, like the one mentioned above, for major events to happen.
But let's take a minor for instance, say of Saturn conjuncting your Mars. When this happens, it will feel like you're driving with your brakes on. You've got all this energy, and it's being shoved down by obligations, discipline, authority. However, if you handle it well, you'll come out of the transit with the ability to discipline yourself, to rein in and channel your energy into appropriate directions instead of flying off the handle. If Saturn opposes your Mars, it feels like other people are doing all the squelching, which makes it a little bit harder to handle.
Transiting Saturn generally reins in, sets limits, disciplines and teaches lessons to whatever planet he hits. It can be a good thing or a bad thing, depending on your outlook and on the particular planet he hits. Saturn hitting the Moon is, in general, pretty depressing.
Kim
