I haven't pictured houses, but I do have similar mental pictures of some of the regulars here.
NOPkins - I likewise have a kind of Ron Jeremy picture, but older and wiser. No ponytail though.
I see Hairdog as one of those teddybear kind of guys. Like you said, one of those happy, friendly, approachable type of guy.
SuperDave actually looks very much like I pictured him.
I have the same picture of CeMar that you do - exactly.
I don't have a clue what Tim really looks like, but I picture him with an average build, well-groomed, but with a full beard and greying at the temples. And glasses.
The ladies have given us pretty good descriptions of themselves, so I think we're all pretty close on them. But I see Mojo as a Lynda Carter/Wonder Woman type.
Odd isn't it? How you conjur up these mental images with nothing whatsoever to back them up.