My uncle has got me to just eating flathead walleye and crappie. I will eat bream if they are big enough but haven't caught any in a while. We caught a flathead that we guessed was 20-30 lbs last summer on a trotline we bled him didn't know if he would be good or not but he turned out just as good as any other flathead. My uncle likes to put a trotline out and run a few jugs so we catch some. Most of the blues and channels get given away. Never heard of brushing the insides I was taught to skin em but anymore we just fillet them