After the initial introductory emails, when communication gets a little more relaxed, I tend to end messages with a list of questions (and then I judge their responses).
Consider doing the same: Allows me to figure out, if we ever dated to the point of sleepovers, whether she'd want to get up and go jogging at 9 A. I could write an answer to this question that would last pages and pages.
M., or whether we could roll around in bed, maybe watch a movie and waste half the day (guess which one I prefer). I want to hear how important food is to her, and how creative her tastes are. This question is less of a test than pure curiosity at work.
I'm, frankly speaking, an amazing cook, and I want to know what's she's bringing to the table (also helps me weed out the vegetarians, without having to ask; I'm fine with vegetarians, but it's like a religion, I prefer to know early). If she says "the water" she may be into surfing or kayaking or a similar sexy sport.
Pick one thing on his profile and make fun of him for it. Type this sentence verbatim: "So, where should we get that drink? " I don't exactly know why, but guys really respond to this.