A challenging question. Just how many white trumpets does a person need?
I have taken out some really ugly bulbs that were very, very easy to destroy, buds that have a tendency to not fully open and when they do, they are not worth keeping around. Things like crimped or folded petals go too. That gives me a start. Patterns not to my liking, they can go too.
Weak stems on a beautiful flower, that's something I might keep around to breed with stronger stem for nice flower potential.
In the end, what I have realized is that if you like it, you keep it. If you are doing it for your own enjoyment, it doesn't so much matter that the world loves what you've done. It only matters if you find fulfillment. And sharing what you find fulfilling can be nice too.