This question came from a comment someone posted in an answer to another question:
What do IRC clients have to do with the professional IT industry?
So, do you use IRC to aid with your work? Do you use it directly (i.e., it is literally part of your job spec), as a nice-to-have but non-essential tool, or indirectly (as a way of socialising)?
What are some of the channels you use 'professionally'?
Note, I'm not sure whether this is a subjective question or not. It seems to me that it can be objectively answered, but I'll add the subjective tag if it looks like it is going the other way.