Shit, I hate to be too honest here, but being a pothead really does have its quirks. I think as far idolotraus meetings are concerned, meeting Opeth on their Blackwater Park tour was just outstanding. I smoked a couple of joints with the two Martins(Peter and Mikael don't really smoke all that much apparently), and it was just so funny to see them get higher and higher, hehe. We actually ended up talking about Katatonia more than anything else, and Martin Lopez was pretty adept at describing the Katatonia members personalities; but this information I cannot divulge out of respect for the band.
I have also smoked with Sherwood from Skinless, Maurizio and the boys from Kataklysm, Grutle, R. Kronheim and Dirge Rep from Enslaved, Bjorn from In Flames, Neil Fallon and Tim Sult from Clutch, and Mike from Cryptopsy. I am not trying to portray myself as a weed whore, but it is very cool to converse with some of your "idols" through that sort of medium.
Meeting Katatonia at the 2000 Metalfest was definitely the best one for me though. I got to talk to Jonas and Anders for a little while we were waiting outside the Relapse stage waiting for Anathema to perform, and they were so cool and friendly, even though I was just shaking and nervous as hell in my fanboy boots.
So yeah, there are a lot more meetings, but these are probably the best of them.