It depends on your time frame if you have already built your nest egg and are trying to live off of it without draining the account, then generating income would be a key decision. I'm still many years from retirement, so I'm more interested in growth than income.
Generally speaking: more bonds = more income and more stocks = more growth.
That is why I compared LC to high yield bonds (JNK is a bond fund), both provide income with little growth. Unfortunately, LC provides less income than JNK with a higher risk.
Young people who are not on the cusp of retiring are usually advised to keep a portfolio that is tilted heavily toward growth and light on the bonds.