I am a digital professional since 1999 with a healthy interest in a multitude of things. I see Wikipedia as the modern equivalent of the Library of Alexandria of old :) When learning new things, I like to add them to Wikipedia provided they are meaningful, sourced and insight adding.
On specific interests: too many to name but here are a few: electronics, math, business, politics, economy, creativity, biology, ...
I'm an editor in multiple language sections of Wikipedia.