When it comes to retiring, 67 seems like the perfect age. If you were born in 1960 or earlier, you're old enough to collect full Social Security benefits, plus, because you're over 65, Medicare has already kicked in.
At 67, you're still young enough to enjoy life. If you've been saving over the years, you likely have a decent nest egg to live off of. Even if you don't, by waiting until age 67, Full Retirement Age (FRA), you won't have to worry about a reduction in your Social Security benefits.