What is a fly rod? Is it used for catching fish in rivers? Lakes? The ocean? I don't know much about fishing.
So it is short for fly fishing rod.  You can fish in lakes but its primarily used in rivers.
Rivers. Ok. I guess you put a fake insect on the end and try to trick the fish into thinking its an insect that has just landed on the water. Yes?
exactly, there are all kinds of different flies, also you can get hooks that go under the water that look like bug larve.
What drew you to this hobby/sport? I don't have the patience to wait around for fish. Do you enter competitions and such?
I don't competitions would change the hobby for me, I like being outside and relaxing I honestly don't even care if I catch a fish.
Do you go with friends? Is this a social sort of thing? On TV I see guys in boats with beer. Are you on the banks of a river, enjoying the peace and quiet?
I do both, usually we go as a group and enjoy the drive or a lunch together but to many people fishing right next to each other can scare the fish off, so when we actually fish we are seperate.
Gotcha. It sounds like a way to relax and get in touch with nature. What fish are the easiest to catch? Salmon, during the mating run? 
Where I live it actually depends on the river.  Believe it or not fish are smart, if you go a place lots of people fish then its harder to catch something.