This was your answer:

I do not want to go into academia, so for me the choice was simple. Also, the uncertainty in funding for postdocs did not appeal to me

Here are the reasons you have given us:

1. I didn't want to go into academia.
2. I didn't want to work long hours for little pay.
3. I didn't want uncertainty in my pay, or job security.
4. I had a bad doctoral advisor, and did not want to continue working in a culture where I had no recourse against a bad boss

Do you notice something? All of these are negatives. And, honestly, that is the only problem with your answer: Framing.

The problem with answering in negatives is that they don't show you working towards a long-term goal, but instead you are drifting away from situations that don't appeal to you. The risk for the company is that you will quit, just as you 'quit' academia. Every job, whether in academia or in the industry, will, inevitably, have down sides. What the interviewers want to hear is that you have positive goals that you do want to achieve. If you can formulate what you want, you can overcome obstacles and/or deal with bad things that are out of your control.

So a better answer would have been (loosely tied to your answers):

• I want to focus on the work at hand, and the insecurity in pay would have been distracting for me.
• I wanted work in the industry.
• I was seeking a more professional working culture than what I encounterd at my university
• In 5 years, I want to be.. (something not achievable in academia)

I left out the point about money, because that's usually not a good reason.

This was your answer:

I do not want to go into academia, so for me the choice was simple. Also, the uncertainty in funding for postdocs did not appeal to me

Here are the reasons you have given us:

1. I didn't want to go into academia.
2. I didn't want to work long hours for little pay.
3. I didn't want uncertainty in my pay, or job security.
4. I had a bad doctoral advisor, and did not want to continue working in a culture where I had no recourse against a bad boss

Do you notice something? All of these are negatives. And, honestly, that is the only problem with your answer: Framing.

The problem with answering in negatives is that they don't show you working towards a long-term goal, but instead you are drifting away from situations that don't appeal to you. The risk for the company is that you will quit, just as you 'quit' academia. Every job, whether in academia or in the industry, will, inevitably, have downsides. What the interviewers want to hear is that you have positive goals that you do want to achieve. If you can formulate what you want, you can overcome obstacles and/or deal with bad things that are out of your control.

So a better answer would have been (loosely tied to your answers):

• I want to focus on the work at hand, and the insecurity in pay would have been distracting for me.
• I wanted work in the industry.
• I was seeking a more professional working culture than what I encountered at my university
• In 5 years, I want to be.. (something not achievable in academia)

I left out the point about money, because that's usually not a good reason.