Luckily I have met her IRL (2012) and can tell you she is a sweet as she looks and will take the time to talk to you. As regards sense of humour she's nutty as a fruitcake which suits me fine as I'm the same.
I keep hoping she'll be over here at a convention again I'll definitely be going.
Meanwhile FYI Melissa O'Neil is on the guest list for Starfury Invasion
http://starfury.co.uk/ October 12 -14 along with others from Dark Matter & Killjoys.