For no-gi, which tends to be more MMA oriented in my case, I use can openers and a double underhook pass alot. I also stand up and pass the guard, which is my second best pass behind the can opener.
Ironman what are your favorite gi guard passes? I am mainly a no gi grappler, and I like to use the no posture pass if you are familiar with it. I don't mind standing guard passes, but would preferably I would want 2 options one staying down and one standing.
For gi grappling, the toreando pass is my go-to move, though I also use the double-underhook pass and the traditional pass (Jeff Monson calls it a "jailbreak pass").
If you want a walkthrough of any of those, I'm glad to give you one.