This is a very subjective question, if your annual income is like Lim Kok Thay, then you can well afford to spend more than 60% of your income on a home loan, as the balance income (after minus the home loan) is still tens of millions, and a small fraction of this is sufficient for you to sustain your living expenses.

On the other hand, if you income is 2k a month, if you pay 60% for home loan, the balance income is hardly sufficient to sustain a living.

In any event, please note that Bank Negara only allows around 30%-40% of one's income for payment of home loan, so even if you wish to use 60% of your income to pay your home loan, no bank will agree to this.