I used to harp a lot about how essential Core Training really is.
Then I took a total departure from it for many months.
One of the funny things about me is that if the rules are bent a little bit - from "Core Work is Essential" to "Core Work need not be done every single workout" I end up jumping at the other extreme of just skipping Core Training for months and months.
I think Core Training is important, it is not essential but it should be done every so often. Initially, Core Training was key to me being able to do my Deadlifts…then I did Core Training too much and my lifts started suffering. So a balance here is key as well and I've figured that doing core work about 1-2x a week for just a few sets is decent :-)
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."
"If you tell the truth, you don't have to remember anything."
"Never put off until tomorrow what you can do the day after tomorrow."