For trout: I usually use a 250 gr sink tip (SA Mastery Streamer)line with my 5wt rod. You need some patients. Just make sure you count down and give it the time it needs to get to depth. I kick along in my float tube at an easy comfortable pace, trolling until I find some takers. Fish any points and any place where you can see the drop offs coming up to the shallows. The fish like to sit around there. I'll pull out the full sink in bigger, deeper lakes. I use intermediate lines in the early and late season. Summer...I want something that sinks faster.
For bass and most othere warm water species, I use an intermediate or floating line, depending in what and where. For walleye, fast sinking or a very long leader and split shot.