The first thing to remember in any reading is that the cards themselves are neither good nor bad- they simply reflect forces and energies at work in our lives. Calling them good or bad depends largely on the context they occur in, and what that means for us- whether this is in line with what we wish to see, or whether it is not.
Next up, let's consider the Tower. This is a card that indicates destruction and a tearing down. Here is the Halloween Tarot version of this card, which likewise contains some interesting symbols.
The next card is one that has several aspects to it- The Devil. The Devil is interpreted as a figure of addiction, and being stuck in a cycle of self-destruction and negativity; the things we'd either like to let go of and can't, or the things that we allow ourselves to be bound to. Here again is the Rider-Waite imagery of this card.
Finally, a card with some less negative interpretations is the Hanged Man. This is a card calling for new perspective, and this new perspective is sometimes born of trouble and discomfort. The Hanged Man often is used to represent Odin, hanging on Yggdrasil, the World Tree for nine days. The story goes that he was wounded, left out unprotected in the elements, and in a great deal of pain. His cries reached all over the World Tree, and even the other gods covered their ears at the sound. So why did Odin do it? To gain understanding and the wisdom of the runes- because the suffering was worth it, in short. Here is the Hanged Man image from the Halloween Tarot.
So in these cards, there is a theme of forces seemingly beyond our control- and indeed, we'll encounter things in our lives that are beyond our control. We are creatures of habit- we like predictability and stability, and when that stability is thrown to the four winds, we get scared and upset. But at the same time, change is a necessary part of life. And it's neither good nor bad, in and of itself. The message here is use that change as well as we can- determine where and how we can be most effective, and use the change around us to make the world we want. Change and growth may well be inevitable in our lives, like Death riding as an unstoppable conqueror. However, lamenting our situation and struggling to hold onto the past are not.