Dave, while investing in property is a business as you say, I see no reason why we cant treat the tenant as a customer, and if things go wrong with a product that I have supplied (ie the house/flat) then I must rectify it. Is it my fault that things go worng? Of course not, but the manner in which I rectify the problem is completely within my control. That is what we do in our business. I am not in for the fun of it, but at the same time I would like to treat people as the way I would expect to be treated.
My former landlord treated the fairly significant issues we experienced as a nuisance; showed me no consideration in getting things fixed, in fact, the opposite. (I also learnt later that she didnt pay the tradies for more than 3 months and they refused to fix up another issue later on!)
If the tenants had a serious problem, say a sewerage leak as opposed to a leaky toilet, then I would make sure that they hadnt suffered any personal loss (eg sewerage had damaged their property etc). I would give them options as to how they wanted the problem fixed - ie if they were able to take time from work or if they needed to make other arrangements (eg have a PM present or similar) One thing I would not do is assume that they could simply rearrange their lives to accommodate repairs to my property!
A leaky tap - well, like you I couldnt care less! But that was never my discussion!
One thing that totally riled me was my landlords assumption that I could just drop everything and be at home to let the tradies in! She said she couldnt just give them the key because she didnt trust them with HER property! And she wasnt prepared to be there for the repairs?
Do I really have choice for the repairs to be fixed? I had no choice as the toilet is in the same bathroom as the shower, which had no recess which meant that the effluent could seep into the shower area. Well, I guess I did have a choice - I needn't have a shower for the next six months!
I see a more personal side to being a landlord; I take it as a personal value to at least be considerate of their issues, but like you, would not tolerate trivial complaints.