First off Lance, your asthma medicine doesn't have enough steriods to make you roid rage. It's all in your head. I have a friend who shot up Anarval for 2 weeks. He would rage like nuts, till he found out he had fake roids. To rage and rage hard, would mean serious amount of roids. Unless you were taking asthma breathers that pushed over 200mgs of steriods into your lungs, your rage is well, an excuse to be pissy.
Extra testosterone will make your hair fall out, if you are predisposed to it. Steriods will make you an asshole, if you are one or better if you let it.
No, it does not shrink the penis, but it does the testicles. A 12 week cycle starts the cusp where you have more testosterone being injected into you than your testicles produce.
What you are all citing are the worst examples of abuse. When done properly with a doctor, to treat testosterone deficency, you do not roid rage, you do not lose hair, okay, you might break out in pimples and acne a bit.
From my understanding, it's not uncommon to gain over 20lbs of pure muscle in a 4 week period using steriods with proper diet, supplementation, and rest.