For my entire fishing life, I've used monofilament line. I've tried most of the standard brands out there. For the last four years, I've branched out and tried some co polymer lines, mainly because of folks recommending them here on BR. These lines work, but after I've used them extensively I can't see much difference between co poly lines and mono lines. Some of the co poly lines handle worse than mono, and have a larger diameter than comparable mono lines, making them stiff and they don't work great, especially on spinning gear. At least for me, the sensitivity claims of co poly lines seem over rated.I feel I can still detect a light hit on mono equally well. For the co poly fisherman here, what is it that makes you choose them over monofilament lines? Do you feel that co poly lines really help your fishing, or, like me, do you think you can do just as well with monofilament lines? I'm still undecided on co poly lines.