things to ask about:

i have enough material to go on for hours about my current writing project: starchaser (i should post about it more). it's a story about a group of friends-by-circumstance uncovering secrets of the galaxy's past. ask about settings, characters, etc. plot is....in the works x.x
i know a good amount about web development, so happy to answer questions there. noted i've been working on one product/company for a while so i may be out of date on some things, idk.
game development, which despite having a degree in it, i haven't really put to use a lot lately. mostly focused on interactive fiction (see point 1), but if i talk shop more maybe i'll get more into it, lol
gaaaames. this is my usual go to for conversation (someone in the audience yells, "nerd!") and i am happy to tell you about what i did or game-based OCs that are pirouetting in my mind.
gender / sexuality stuff: can't speak for everyone, but i have a perspective to share.
a single random word from a dictionary: i'll probably be able to write an essay or a short story about it, it's a fun exercise!
most any of these questions