Rewind, your open note to WHIMP is not upbeat or breezy, but then again, I get that it wasn't the intention. As long as these negative attitudes don't seep to the surface while on a date with other women; that would be my concern.
My advice -- when things don't click with a date, don't take it personally. I know, it's easier said than done. The way you take things out of the chat rooms and into a cafe relatively early is perfect. Personally I cannot gadge chemistry through online communication such as Instant Messages or email. However, when I meet a guy in person, I know whether or not chemistry exists. Perhaps she is the same way. It's not a bad reflection on you, (although I understand why the big personality comment bothered you; that was weird) you were not her type.
What it basically boils down to is . . . you don't want to be with someone who doesn't want to be with you. With that said, why not change your perspective? Instead of focusing on "why wasn't I right for her," ask yourself "what's right for me?"