I have my best luck flippin with heavy mono/copolymer than anything else. Flouro is useless once it gets knicked. 25 pound flouro with the tiniest knick in it is just as weak as 4 pound mono. It will get knicked up often on/in heavy cover too. I tried Flouro for flipping for a while - it is stiff as can be, and needs to be re-tied way too often.

I also tried braid. I hate braid for all applications except for 2 months out of the year when I have a frog tied on and stay in the grass. You cannot break off if you need to - it seems to wrap around the brush way easier than any other line too.

Big mono helps me in several ways. Even when it gets knicked a little it will maintain most of it's strength. Still re-tie often, but have no fears on hooksets. I can see the smallest twitch in the line. And the bulk and bouyancy of it helps for a slower fall.