I talked about this in a different thread: the value of owning your own home isn't just a number. There's a certain psychological value to knowing that, when things seems to be going off the rails pretty regularly nowadays, they're gonna have to go off the rails, over the cliff and into the river before you can lose your home. I overpay every month too, and I see my aggressive savings plan as essentially a self-funded mortgage insurance. It's a 30 year loan, and every month I save the value of the mortgage, so I really only need things to be okay for 15 of those 30 years and I still walk away with my house.

I dunno. I calculated that paying an extra $200/mo on my $240k loan at 3.75% would wipe about 8 years off the 30 year loan. I think the interest savings is a good chunk but not a life changing amount of money when spread out over 30 years. In my view I'd rather have the security of a paid off house than the marginal potential gains from investing that money (in addition to my other investments) over the same time period.

I'm sure on paper it makes more sense to pay the minimum and invest the rest, but again I'd rather be more conservative and it's likely I'd just spend that money on something else like a new car.