UTF-8 is the best for you egocentric¹ English speaker. If you were Japanese, about 99% of your characters would take 3-4 bytes instead of two in UTF-16.

Non-latin dialects really suffer from UTF-8 on the size level. Don't forget that within a few years, most of your clients might be Chinese, and Chinese writing has millions of characters. You can't sustain that efficiently with UTF-8.

_{1. Don't take the egocentric part personally. I wanted to make a colorful illustration and I don't really mean it.}

UTF-8 is the best for you egocentric¹ English speaker. If you were Japanese, about 99% of your characters would take 3-4 bytes instead of two in UTF-16.

Non-latin dialects really suffer from UTF-8 on the size level. Don't forget that within a few years, most of your clients might be Chinese, and Chinese writing has millions of characters. You can't sustain that efficiently with UTF-8.

Otherwise, I hate it when I have text documents that are not in UTF-something. I'll often go out of my way if I need to to have proper encoding. In my book, non-Unicode encodings are dead.

_{1. Don't take the egocentric part personally. I wanted to make a colorful illustration and I don't really mean it.}