Funnily enough, those are two CC members that I had a strong mental image of.
Yes, me too - Noodley looks like Ronnie Barker, and Fab like Leonard Rossiter. I think even if I ever met them, I'd still have that impression once I was back online.
Dayvo is another one, and I have seen photos of him, but the idea still sticks.
I think with other people, although I can't think of a specific example, I tend to imagine them looking a bit like a member I have met, maybe one who has a similar posting style or opinions. Funny, isn't it?
And even funnier to think that not so very long ago, most people had no idea what even famous people really looked like - before photographs and telly and so on. There would even be members of your family you wouldn't know if you passed them in the street, if you'd only ever exchanged news via letters.