All of these posts assume that all of us getting out of dental school are going to be ALONE! (not really... my posts are aimed at balancing your cash flows of which a spouse's income would add to. If you have the cash flows to pay off your loan more aggressively, then by all means, do!)
For those of us that will have assistance from a spouse/partner (with a job)... aggressive loan repayments are not bad at all.
Yes, if you plan on going to USC (as an example), getting out and trying to live alone in North Hollywood and starting your own practice with no spouse or other income... You will probably find repayment difficult. however, if you are smart about choosing a school (this can be difficult for those many applicants that are only accepted to expensive schools), finding a cost efficient place to start your business (this is also fairly difficult to do as well as being somewhat reliant upon luck)(if that is what you choose to do) and you have another source of income (there will be quite a few single dental grads that will not have this to rely) (even a small income), you should be MORE THAN FINE.