I grew up using it and found it a great tool for people to connect and even contribute to projects or just programming in general. I feel even to this day, the ambiance created by IRC "back in the day" with all its contrived features such as server linking and splits, channel ops, bots, and opers still haven't been captured by any of the social media giants even today.
The best things I found about IRC were, TCL scripts, Eggrop bots, and all of the Ascii art that people would use.