When I say that for me it sound good I unfortunately always think about sound that I can produce. I am never satsified. Main reason is my hooked nail and I try everything (gut string, different nail file, spoon,...) to avoid hissing sound but it is not easy. I know that everyone who have strong and straight nails don't even think how can be frustrating and think that it is default. But it is not. It is a treasure!
Now I understand you better. I don't know do you have a problem with nails but I am jealous at sound that you can produce. Tonight I hear you again and think about your words. I am still satisfied with your playing but at the same time I have a feeling that you can produce a better sound, just need time, patients and dedication.
For me it is interesetingly that you can produce clear tone and wants more than that - it is praiseworthy attitude. I am sure that you will find what you are looking for (angle of RH, nails, different strings,..).
And once more, do not forgot about beauty and power of other strings (not only 1st E), they must be pretty balanced and accompaniment.