Don't automatically choose the annuity payout many of them offer if you're given a choice. Again, the IRA just gives you more flexibility.
IRAs give you more control and they give you more investment options than a 401(k).
Most are extreme optimists, who see opportunity all over, especially in their field. Often, their success prevents them from being conservative and protecting their downside.
It's still important to be across the asset classes. A bit of everything goes a long way.
Making that transition from paycheck to no paycheck scares a lot of people.