Your comment about positive feedback loops makes sense in the absolute but I think it's a bit more complicated. With climate you have lots of different cycles all operating on different time scales. While a positive feedback loop (like loss of snow albedo leading to more warming) may dominate for a while, it may eventually be overturned by another cycle, such as long term changes in the orbit of the earth around the sun (Milankovich cycles) which would eventually act to cool the earth back down.
But we need to be concerned with the short term effects, and most science suggests that these are going to hammer us in the near term (the next decades and possibly centuries).
You mean the reality is more complicated than cogitator's claim that "most of the feedback loops are positive?" I agree, it is much more complicated.
For my own part I'm not too worried about it. Within this century we'll have the technical ability to feasibly control the Earth's energy budget.