>>>Just to balance all the negativity, I'd like to hear your opinions on what is the most important thing that makes a developer a great developer.
>>>
>>>Is it whether has
>>>- Excellent analytical skills?
>>>- Highly proficient with the used tools?
>>>- Fast?
>>>- Ability to write clear code?
>>>- Good communication skills
>>>
>>>Or perhaps something else?
>>
>>I think trustworthiness should be in the mix.
>
>Would loyal be a better description? That would include developers who do not leave when they get a better offer elsewhere ?

Trustworthiness and loyalty are different things. A poor developer can be very loyal.

If a great developer gets what they carefully consider to be a better offer elsewhere, why would they not take it? To some extent self-interest is important for markets to operate as we expect. How did you hire that great developer in the first place, and how do you expect to retain their services?