I've seen a few threads critical of P.ie so I thought I'd suggest my top three favorite things about it.
1. News. I find the site incredibly newsworthy. Pop in here and you pick up on Irish news stories incredibly quickly. Often before they appear on news sites.
2. Depth. Because there are strong opinions on opposing sides of nearly every discussion, the issues get probed very deeply, from different angles, from different perspectives and often with highly informative links, images, historical background included that can be very illuminating.
3. Humour. Even in the middle of incredibly robust and fiery debates posters often drop in hilarious laugh out loud posts, retorts etc. Probably much like myself, there are posters who behind some pretty vitriolic opinions are probably laughing away at some of the exchanges. And when a pair of posters get into a pointless tit for tat (and I've been there) it can be damned entertaining at times. No wonder our Irish hating element still cant help themselves coming here regularly rather than forums that would be presumably more aligned to their mindset.