When I am working on a project and find myself consistently making mistakes I get angry and frustrated.
Fortunately, consistent errors are the easiest to fix. Repeatedly doing the same thing incorrectly is a pattern and patterns can be more easily dealt with than their sporadic counterparts.
Take for example an analog or digital circuit. If we find a consistent pattern of unacceptable performance it becomes easier to assign a fix to it: feedback, frequency compensation, even protection circuits.
It is the wild card, the maverick, the occasional gremlin that causes hair loss.
No, if we have to endure and then fix problems, give me the consistent variety.
Tracking down an occasional glitch is maddening.