Certainly there are many other valid reasons, but these five are at the top of my list.
While there are many other reasons to file bankruptcy, such as to save a house from foreclosure, save an automobile from repossession, protect a co-signor, structure a repayment plan with the IRS, remove a lien off one's residence, etc., the fact of the matter is that there is always more good that arises from any bankruptcy than the bad you may have to suffer in the short term.
If you are considering filing for bankruptcy, and are in debt over your head, please take your most recent paystub and list of creditors to an experienced bankruptcy attorney. Ask for advice and be open minded. What you might hear at that consultation shouldn't surprise you. While the decision to file is usually the toughest decision, once it is made, it is always the most gratifying decision you can make!