...if we hire you.? In the past 10 years, I changed jobs every 2 years (leaving in good standing), never fired.

while employers don't expect people to stay forever, it does take time and effort before a new employee becomes truly productive so they don't want someone who is going to leave too soon. What too soon is generally depends on the job. The more training and expertise your job requires, the longer the employer is going to want you to stay.

While an occasional job that lasts two years is not a big deal, your habit of changing jobs every 2 years would give any employer pause. You may want to choose your next job so that you can stay at it longer to break the cycle.

If I was considering your resume, here are some of the things I would be concerned about as possible reasons for your history -
- you're unsure of what you want to do
- you don't get along with people (and leave before they fire you)
- you are not competent in your work (and leave before they fire you)

Remember that even though you left in good standing, most employers these days won't confirm that due to lawsuit potential. They will only verify that you were an employee. So what you need to do is make sure your answer will address the unspoken concerns I listed above.

Reasons for changing jobs that I would tend not to be concerned about are
- job was a temporary nature or company was becoming unstable.
- the job lacked advancement opportunity
- it was necessary to move to another area.
- you developed an interest in another job path and wanted to pursue that (as long as its not too many times - otherwise it looks like you don't know what you want).