I actually enjoyed my job a lot. I was never the "lives for my work" type - if I didn't have to go in I was happy to stay home - but I didn't hate going in. And retiring came with a few misgivings, but I was at the same company for 40 years in different capacities and it was time.
It seems like they've made retirement harder and harder. I hope we figure out how to fix that by the time you get there.