There are a few other UK pilot forums (fora?) but if you prowl them all your eyes end up sore, you get a bad back, and you get no work done
I think PP offers a reasonable balance between information content and a reasonable discussion, and being dominated by a bunch of people posting 10,000 one-liners per year who rarely say anything worth reading but generate a load of messages which one has to wade through..
For me, PP is more fun than buying and reading a newspaper, which I think is a reasonable approach.