I'd say that there isn't THAT much more arsekissing from Prichard. He's probably always been open to returning, and he always had that tendency. But I still think he provides enough actual insight to make it worth it.
Have to agree with Bischoff having become more open, and been quite happy to say "could have done that different" a fair bit. He also has a good thing where he drops info that isn't THAT big a deal, but it's just wee insights that make it an easier listen.
I'll give Angle a shot at a later time when he's been there a while, because he'll probably have more to say at that point.
I can see JJ being fascinating. Not listened to it yet, but he's been involved in so many places at so many important times in so many big things. So even if he doesn't open, he seems like someone who will be a great listen.
Nothing against Arn but he's a bit dull. JR I've given up on. I think I'd listen to Schiavone if it was more focused on the same era as Bischoff, but I suppose that's already covered so fair enough. I like Schiavone so I'm sure it's great.
Hero's really depends what he's doing. If it's an Ask Anything, he can bring out some great shit.