I love me my Shockwave... it is the most dependable disc in my bag. If I need something less stable, I go for my Aftershock. Even less stable is my Stratus. If I want to hyzer spike or skip, my Star Destroyer is the way to go.
Although I carry the other two (Roc, Buzzz). The mids that tend to get the most use in my bag, are my HD Hawk and my CE Classic Roc. However, that's this week. I've been messing around with the Spider, Panther, and Gremlin. I must say I'm impressed, but I've always liked the small diameter discs. I just haven't found one that will top the Roc or Buzzz.
I did use a z plastic MRV and a Stingray. I lost the MRV at the Checkered Flag tournament in Indy last June and I gave away my Stingray to a friend who lost his one understable disc he had in a tournament earlier this month. I now use a z plastic Wasp and a star Mako, both of which were given to me. You gotta love Karma :) I also have a Roc and a Shark that are my backups.