I think my favourite was probably the Canadian circle at Worlds '07 with Johnny Suderman, Byrin Wylie, Andrew Grant (and also Dan Ednie for a while). It's super cool to think of Byrin and Johnny in the same circle.
I think another favourite was, like, me in an all pro circle at Worlds '08, with my favourite player Aleksi Airinen, Justin Dale, I think Tuukka? And Samu? I can't even remember. I just remember getting lots of props from my favourite player
Oh, I was in this crazy circle at New Years Jam Chicago 2009 with David Clavens, Johnny Suderman, and Ianek Regimbald, and then just me and Dave for a while. It was suuuper cool. But it wasn't very fun, because I felt so much pressure (I think everyone, including Honza, was just watching...). Then Evan Gatesman and I think Ben Skaggs joined and I had to leave, 'cause I just couldn't compare to that kind of shred, obviously.
I suppose, based on the evidence, shred with Johnny is rather memorable!