Harmony is theoretically wonderful.

But...

I don't sing harmony for a number of reasons. Mainly because given the people I sing with regularyly there is no need for yet another harmony singer.

A personal observation:
Lead singers often at least profess modesty. In my experience it is not unusual for a lead singer or the person who starts the song to apologize in advance for real or imagined shortcomings.
I have never met a harmony singer who was the least uncertain about his/her harmonizing abilities. Why is this?

A number of harmony singers of my acquaintance sing harmony for what to are TO ME (the nonharmony singer) not the best reasons. As one person put it, "When you sing harmony you don't have to know the tune." She then proceeded to make it crystal clear that she did not know the tune.

A number of harmony singers of my acquaintance apparently follow the rule "anything goes." TO ME (the nonharmony singer), and to MY ears, that is not the best approach.

Russ (the last GUEST standing)