Big fan of Polypro line. 6# diameter=20# test on trolling rod.
I got tired of losing expensive lures when they hang up. Casts well and doesn't bird-nest easily.
Heavy test and right drag setting let's me stop and back paddle to free snag more easily. Hardly lose a lure now.

On waldo/Smallie line, I like the Tectan brand of line. German made, super thin but strong and flexible. I use the 11# test, which is equal to 4-6# mono. Cabelas use to carry, but I don't see it advertised anymore.
More expensive, but I like it a lot..