That in fact brings up an essential point. A great deal of a fly fisher's "success" (also that is measured subjectively) depends on their design and also their skill level. What could function perfectly for one may not function at all for an additional. It is an excellent suggestion to speak to individuals that have experience as well as have attempted various things and have discovered what works for them. Visit a regional fly shop or ask inquiries in on-line forums. Another great resource is the smaller sized online fly fishing retailers. Usually the smaller firms will take the additional time to address your inquiries and give advice.
Normally, the much heavier the weight of line the higher the line speed so it is a great idea to take that into account. It will usually have more impact as it hits the water too. There are times when a much more delicate hand is desired to not terrify the grains from the fish with the line slapping the water.