About the "off" vibe that Marcus mentioned,
I think it may largely have to do with his 15-17 years of delving into conspiracies, combined with the ridicule... this has given him somewhat of a stern, cold or at least not as 'positive' a look in his face, as he might have had otherwise. "Knowing" about the worlds leaders being reptilians may have been too much of a strain on him at times.
I like Icke in certain ways, but I also agree there's some faults to be found with him. But some (several) of his books, like for example The Biggest Secret, does have large tracts of important and good information, and not least he seemed to have a gift in portraying esoteric/fringe topics in a way that makes it understandable for a lot more people than the "mumbo-jumbo" of a lot of other spiritual/occult/esoteric information. I do agree with the suspicion that he passes on certain bits of information that has been "fed" him without him realizing it, and so on. His information, as with it all, should be utilized with discernment.
The thing is, he's reaching a lot of people, and it seems, more and more people, with his views, and he's fast becoming the most well-known presenter of these topics, including the "larger reality," and I wonder if it might be best to forgive him his faults - because I see that the thoughts he's spreading are ultimately benefiting humanity anyway (at least the majority of his thoughts). And if his popularity keeps on rising, the voice he claims to have heard, telling him he would be remembered and talked about a hundred years from now, might even be right.
When it comes to the potential disinfo, and him spreading it, I wonder if maybe we should give (most) people more credit than that; if they just learn about the larger reality, the truth of spiritual matters *in this reality,* and that they should always think for themselves (all of which Icke advocates), maybe they'll be able to discern Icke's material as well. I don't know - but I have to give David credit, he was a vital part of my "awakening" as well, even if I now see that his material should be looked into with some caution. I actually started out being very sceptical initially, largely agreeing with those labeling him as a loonie, then I almost did a 180 and agreed with mostly everything, and now I'm back to a somewhat more sceptical stance. I cannot ignore the initial benifit I had from some of his material though - it really confirmed ideas or thoughts or even "feelings" I've had since I was a kid, and all in all benefited me a great deal.