At age 30, I was not thinking about retirement. I went back to school; and spent my 30th birthday taking a makeup exam in Crim Law. (Had a stomach virus - violently ill for regular exam.) So, I was thinking ahead toward my career.
I probably initially thought about retirement (without any plan of how to get there) as being age 70, based upon social security.
Then, due to nagging from DH, I lowered the goal to me 65, him 66 since we would then both be covered by Medicare.
After attending a Union meeting with DH regarding retirement benefits, I learned that there would still be able to get (subsidized) healthcare through the Union, and told DH he no longer had to work to 66, just till he "maxed" out the percentage portion of his pension, which was age 58. (It is a percentage x the number of years worked.) I was still thinking of me at 65, although DH wanted me to leave earlier.
I then had a battle with C - which included two surgeries and left me exhausted; and lowered the age again to 60, although that makes me nervous.
In spite of starting off with some low paying, crappy jobs, (when I was interviewing they did ask about families, and having - at that time - five small children - seemed to have the same effect as me saying I had an infectious case of the plague), I did manage to pay off the mortgage in seven years, put five out of six kiddos through private school, pay for my kiddos (who wanted to go) through college, and compile a retirement portfolio. To be clear, this would not have been accomplished without DH paying other bills and expenses.
So now, it's getting closer. DH wants to go April 1st, and wants me to leave at the same time. I am looking at August of 2020. We are not exactly aligned as to spending strategy. I am willing to work after he retires. So, we'll see.