I'd be open to joining a league , or would consider starting one if I found a hand full of guys that were like minded and available on a somewhat regular basis...
But it seems maybe more practical to just try and find others who just want to do some fun racing on a ongoing basis... and see if anything larger comes out of it.
I tend to enjoy GT3 a lot, but also have really enjoyed some Group 5 racing too... but I'm open to all sorts of things. Open wheel would be OK, but I have yet to find even a small number of people who can get anywhere near close together with open wheel and not just wind up in a pile of wreckage...
As I was suggesting, I'd be interested in something more formal as time goes on, if it seems like there's enough interest and agreement on what the format should or could be.
my PSN ID is iggyturtle