Now that I've paid off my house, I can always take out another mortgage to invest in "better investments" if I want. That's an option, but I say NO THANKS
There's a peace that comes with owning your home that's hard to describe. Having zero debt means you can basically do whatever you want with your life and never, ever have to worry about foreclosure or making a payment to a bank.
Sure, I could take out a low-interest mortgage to buy mutual funds or bonds or CDs or whatever I think will generate a higher return than the cost of interest on the home loan ... but to me, it's just not worth it. I'd rather have the peace and security of living totally debt-free and still have a big chunk of income to pour into investments every month.
I don't fault people who look at the math and decide to keep their mortgage. It definitely makes sense mathematically with the right investments ... but for me, it's just not worth it. It's more an emotional thing than a mathematical thing.