Hand-drawn visuals are far friendlier than standardized fonts and stock photos. And hand-drawn visuals are even more inviting when created live, right there where everyone can see.
The drawing above was created during the opening remarks at the Women in Cyber Security conference the end of March. It was then displayed near registration to welcome late-comers. Not a high resolution file shown here, just taken with my iPhone in the moment.

To see the whole set of visual notes from the Women in Cyber Security conference, check out this Flickr album.