I wasn't a member at the time of the original vote and I must admit that I was, like pieman above, put off by the shenanigans. However, the insurance (and a handful of PRKs) swung it for me and I joined at the Cycle Show.
Some of the arguments for the change are quite compelling, IMO, especially the point that, since the 2006 Act, a "charity" can act on behalf of it's members so it could make the tax breaks a form of free money for the CTC.
However, I could never vote in favour of something which has been handled the way that the council appear to have handled it. The article in Cycle was completely biased, the CTC rep just used the space for gratuitous attacks on Jeff Tollerman and the other objectors, there was very little by way of persuasive argument, just pettiness. As campaigns go, it felt more like something from a 1970s political party (rivers of blood and all) than anything that I'd want to support in 2010.