Full Contact Basketball

[Simbio]

I'm a football official, but love basketball as well. I play in pickup games at my gym and such. One thing that I've never liked about basketball is how fragile it seems to be. What I mean is, it seems like fouls get called on ticky tack things. When I play in a pickup game, unless somebody really affects my shot, I would never call a foul. My question to you as officials is: what do you go by to determine if it is a foul? Is there some standard you use?

In football, say on a holding call, we determine was there any advantage gained, was it at the point of attack, or was safety an issue before we would make our decision. Do you go by the same sort of thought process, or is it simply if a defensive player makes contact with an offensive player on his shot? I know there are different kinds of fouls too, shot fouls, blocking fouls, offensive fouls, charging fouls. I'm mainly curious about shot fouls and maybe blocking fouls. How do you determine what you call on those?