poppers and walking baits use 12-17lb mono because it floats (for the most part) and has some stretch for keeping those treble hooks in there.
for frogs, horny toads, and rats I use 50-65lb braid, mainly due to the cover those lures get thrown and pulled into. No stretch means you gotta be patient when they blow up on your baits.
for spinnerbaits, chatters, bladed swim jigs, and buzzbaits I recommend 14-20lb mono, copolymer, or flouroflex (blend of flouro and copolymer).
I think it's worth mentioning that flouro can play a huge role with your jigs and plastics, too- so don't get married to using braid that much. It works great until the stained water turns gin clear and the fish take all day looking at your baits.