@JJ P. -- thank you for sharing.
I mentioned the fireplace issue as an example of frivolous maintenance requests. Though we did not immediately pull the plug on servicing them, in the following lease contracts we made the fireplace a decorative item only, so we would not be responsible for service calls for its maintenance and lighting up. Now the tenants can still hang stockings during Xmas, but cannot light the fireplace. The house has a gas heater, therefore they are not exactly suffering without a fireplace. But this was one example.
I hear you, that the key is to manage the property manager closely. I do have a condition to get an approval from me on *every* maintenance request, anything over $0.00. Also, I am a remote landlord, live too far to drive down to the property to check it out, and therefore the PM is my ears and eyes. Although they are very professional, perform decent quality repairs, and place upper middle-class tenants who always pay rent on time, take good care of the property (except one, who had a special situation but as a result destroyed the property, BUT paid rents on time, always, and paid the damages too. But that story is for another day!)
What I am noticing, however, is that there is a steady stream of maintenance requests. (This property has been rented since 11 years and the past 4-5 years, ever since the frivolous cannot-light-the-fireplace type tenants who are now gone, the frequency of maintenance requests has gone up.) These days, most maintenance requests sound less frivolous than that, but I am always left to wonder what the tenants might be doing to cause the problem to happen! The PM assures me that the tenants are "stellar" -- so what gives? I myself live in a 70+-year old house, and I never have refrigerators randomly leaking water, or dishwasher door suddenly stopping to close, unless I mess up.
The only way for me to ascertain that this is "normal" is by asking around other landlords' experiences, especially those who are in similar situations to mine. That is the reason for my original post. Thank you all who contributed so far, your insights were helpful.
P.S. I must also say, there is a big shortage of good property managers in the PDX area. A couple of years back, my PM company (the same company) had one manager manage my geography and the person was doing a poor job, therefore I tried to interview two other companies who came highly recommended by others. My experience was dismal. One person made a time to speak with me and did not turn up. The other connected, we discussed our situation, she gave me her usual sales pitch, and she did seem knowledgeable about property matters in general, and then I never heard back from this person. It was mind boggling, that their business was so good that they were able to turn down a hot property in a hot market! Anyway. Hopefully my experience was non-standard, and hopefully there are dedicated and honest companies still in business. Thanks for reading!!