I mean personally..... who do you think you'd like to sit down and have a coffee with and who do you think you'd get along with the most? I'd have to go with LaBrie. Second, I'd go with Mangini.
Despite my distaste for much of his public behaviour and some of his decision making wrt DT, I suspect I'd actually get on best on a purely personal level with MP. Keep him chatting about neutral subjects that he's enthusiastic about and he seems like he'd be good company.
JP and JLB I'd just be itching to get a lesson from.
JR I think I'd struggle with. Not sure why, but I always get a slight air of otherworldly detachment about him that I'm not sure I'd find easy to cope with.
JM would be fine as long as I had something to occupy myself with other than conversation as I suspect there'd not be very much
happening
From what I've seen and read about MM I'm afraid he'd get on my nerves very quickly.
Sherinian seems like fun, but also seems like he'd always be looking over your shoulder at women/someone more important than you
KM. Hm.
Charlie. Heh. Could be fun... could end badly...!