For those of you that are contractors, and have been a while, I'm curious about something. Based upon your years of experience (residential mostly but commercial could apply also) what is the most predictable aggravation you face on projects?
Sub's not providing quality service including being there when they say they will? (Electricians, Plumbers, Sheetrock workers, etc...)
The ability to find qualified and dependable workers including untrustworthy workers?
Suppliers that do not get materials on site when they promise or say they will?
Local Governments and inspectors with burrs up their butt?
Local restrictions and codes?
Do It Yourself type homeowners who are constantly second guessing you or changing things up on you during the project?
As I said just a curiosity issue and I know that each could be equally picked depending on the project I'm just curious if there is a trend or common problem that occurs more than usual.