I think it is important to have minimum criteria to stick to, should make finding a good property less of an emotional decision and more of a business one instead.

If you consider that your future business decisions will all be based on negotiations of some sort and you get emotionally involved to what better suits the other side rather than your own life and that of your families you are sure to fail.

The mark of any good con is to play on someone's emotions (whether they be positive or negative) In this case the joy and excitement that you are felling may potentially be a bad tenants open door to their next landlord victim.  

This is possibly going to sound a bit harsh....You either need to hire a property manager or not be so emotionally tied to what tenants do or don't do.

People in a distressed situation have naturally heightened emotional reactions and sometimes react by not facing the problem.

.- During that initial week of escrow that the buyers are rushing around getting things done, mom dies, and the buyers frankly do not have the emotional strength to go through with this at this moment.

The hardest part is that people tie real estate to emotion.

Tell them "My business is based on referrals and my goal is to provide you with 10+ service so that when you close on your home you feel confident and excited to refer me to your closest family and friends"2) Then: when the transaction is at it's most emotionally charged (positive) state, say they just won out on a multiple offer, ask them for a referral.

Something just to remember is not to kick yourself if you miss A - and definitely do not then justify to yourself overpaying for Property B because you might have missed out on Property A (base the offer on your math) and do not let your emotions get the best of you.

On the note of the "emotional side" of the transaction that is quite common not everyone is approaching the real estate transaction from the standpoint of the buyer/investor most times it is an emotional time either because of death, divorce, attachment etc.