"respectable skeptics" agree about [...]
My impression (which is only a handwavy impression, and I'll be happy to be corrected) is that climate-change "skeptics" used to say that there was no global warming, then that there was some but it probably wasn't anthropogenic, then that there was some and some of it was anthropogenic but that it was a good thing rather than a bad thing, and now that there is some and some of it is anthropogenic and it's probably a bad thing but the cost of stopping it would outweigh the benefits. In other words, that what's remained constant is the bottom line (we shouldn't make any changes to our industrial practices, economic policies, etc., to mitigate anthropogenic climate change), but the justification for it has become more and more modest over time, perhaps in response to strengthening evidence or to popular opinion.
(Of course not everyone who can be categorized as a "climate-change skeptic" holds the exact same opinions; the above is intended as a rough characterization of what I think the typical "respectable skeptic" position has been.)
Funny - a lot of the skeptics complain about the same tendency among people who want to halt industrial capitalism - it's one of the biggest sources of grumbling I see.
Note: Please see this post of mine for more on the project, my sources, and potential sources for bias.
I have written a couple of blog posts on my understanding of climate forecasting, climate change, and the Anthropogenic Global Warming (AGW) hypothesis (here and here). I also laid down the sources I was using to inform myself here.
I think one question that a number of readers may have had is: given my lack of knowledge (and unwillingness to undertake extensive study) of the subject, why am I investigating it at all, rather than relying on the expert consensus, as documented by the IPCC that, even if we're not sure is correct, is still the best bet humanity has for getting things right? I intend to elaborate on the reasons for taking a closer look at the matter, while still refraining from making the study of atmospheric science a full-time goal, in a future post.
Right now, I'm curious to hear how you formed your views on climate change. In particular, I'm interested in answers to questions such as these (not necessarily answers to all of them, or even to only these questions).