Welcome.
There are different correct answers to that question. First of all discs of the same mold, plastic and weight vary in flight from each other. Then there is the matter does it flip for you and doesn't a disc flip for someone else and what explains the differences. You need discs that both flip and don't. What you need the information about a certain disc generally not flipping for is to determine if there are problems in your form. Once you know for sure that you have a problem somewhere you can start to hunt what it is. And when you identify the problem finding the cure may be as simple as asking for advice here. So which discs do you flip and suspect that they shouldn't?
If you asked about which discs you need to hyzer flip you can find out by going to a field to throw them at different power levels flat and observing the flight. Your power also means a lot so how far do you throw on a low line drive and at which altitude you are?

