I am definitely less frugal since retiring 5+ years ago.
My spending used to be constrained by a feeling that it would postpone my FI and retirement dates, which I had long looked forward to. I rarely ate out, most of my travel was bicycle tours, no cell phone, etc. This was a deeply ingrained habit, not really a set of conscious decisions, and did not affect my enjoyment of life.
Once I retired, those feelings went away. My vacations have gotten more expensive, I buy more electronic toys, and basically spend all of my 'income" (72t withdrawals, covered by dividends in my IRAs) with no guilt at all, even though my net income (after taxes, health insurance, etc) is about 50% higher than when I last worked.