The answer will be different for each person. You have start with a few things.
How much $ would your family need if you died tomorrow? Enough to bury you and pay off some debts? Enough to pay a mortgage, so your family can live without your income? Are there day care expenses, medical expenses for you or family members? Etc.
What can you afford, each and every month, even if you lose your job or become disabled?
The answer to those questions will determine what you will buy.
ROP isn't bad. Obviously its more expensive than regular term alone. Its a risk. Its not much more expensive, but it is still more expensive.
UL isn't bad, unless you're not prepared for higher premiums at some point during the policy term.
My suggestion is to start with what you can afford, and see how much insurance it will buy for each of the policies that you're looking at. Go from there.
Do NOT buy insurance if you won't be able to make the premiums.