Re: catching bigger fish
Either form of casting will catch bigger fish. Spey casting is easier on you than the traditional back and forth casting so you can stay on the water longer without wearing out your shoulder. I think that whichever way you go, it will be presentation and location that will be the largest factor in your ability to catch bigger fish consistantly.
Each smallest act of kindness - even just words of hope when they are needed, the remembrance of a birthday, a compliment that engenders a smile - reverberates across great distances and spans of time, affecting lives unknown to the one whose generous spirit was the source of this good echo, because kindness is passed on and grows each time it's passed, until a simple courtesy becomes an act of selfless courage years later and far away.