When I moved in I quickly had a hot shower unit installed. Prior to that she had been taking a regular tap water shower for years. Ok in the summer, freezing ass cold any other time. I was not having it. I bought the unit for less than 3K Bt at Lotus and had one of the local sparky's fit it for another 300 Bt. It was as if I had hung the moon. She still thanks me years later.
I must also add that I feel much the same as some others here. IMO most of my other gifts, acts of kindness to others have been well underappreciated or even ignored. I don't do them much anymore.