I have done a lot of reading on fishing, and tactics but i know very little when it come down to what type of line to use and why. I am not talking about diameter. I know not to use 20lb test for gills and stuff like that. but i heard that certain lines are made for different types of reels. It seems that my lines have a lot of memory in them. I do change my line often. How much shelf life does a line have before it starts to go bad? what are the different types and why would i use them? If anyone could give my some insight that would be really appreciated.