Original results often aren’t reproducible because as you said they’re incentivized to publish significant results, and therefore often find an effect that isn’t there:
1. Experimental design - Researchers make design choices to lead to significant results (e.g....
Another 2 items for your list:
particular to your context: the experiment worked in your hands, but it works ~only within your particular context (the pollen mix in Austin, or your particular handwashing protocol, or the way people at your university smile to each other, or the...