Gotta say Limb Bream has to be the worst. Put one of my had tied flies up in an oak tree the other day. Not a very satisfying cast to say the least. Bad thing was the trees were the only thing taking my flies that day.
alligator gar. if they don't just break the line with your hook and bait in their mouth then when you get them in they are a pain in the butt to get off the line and to handle because of their teeth. bass and catfish I love to catch. and the 1-4 inch bream work as good catfish bait here so the length on the bream to me that I hate most catching is between 4-7 inches because I don't keep them to eat and can't use them for bait legally in Arkansas. second to the alligator gar has to be stick/weed/tree/stump/or any other snag.
I'd have to agree with catfish and "limb bream" (never heard 'em called THAT before!), with the limb bream placing first in this competition. I lost 8 flies in one morning to that species, thanks to the monstrous howling winds we had last week.