I am pretty mixed in the above.
I will have a pension, and I may even have two different pensions. I also plan for withdraw at the 4% rate. I'm starting later than most, at 36 years old, so I am looking at 50+ to retire. I won't be able to touch the pension(s) that early. So, I would like to have enough to withdraw at the 4% rate without depending on the pension. It might not be feasible. I also might enjoy my current career, at that time, and work until I can retire at a normal age. I am not opposed to working, I would just love to have the option to walk away from it, if it was necessary.
Last year (2015-2016), I had an absolutely awful year at work. I came home every day unable to function from the stress. I took everything personal home, and walked out every day leaving nothing important behind. I, honestly, didn't know if I would come back the next day. My wife was fully on board with me quitting. We could make things work until I found another job. It was horrible. I ended up with shingles from the stress and gained like 30 pounds. I would have quit, but we just couldn't do it. We could have made it 3-5 months, if we cut back on everything, before real disaster with me out of work. That time period wasn't long enough for me to just walk away.
I never want to be in that spot again. I want to have the option to walk away if things get really horrible. I want to work because I want to work, not because I have to work. For me, FI is much more important then RE. The RE would be nice, but it's secondary.