The new Kamaka Strings are very “warm” and balanced. They are not as bright as some other brands, but they have a nice round sound and great intonation from a machine radius and rectification.
Some people listen to others or read forums to see what strings others are using. BUT... Every ukulele, technique of the player, and personal preference is different. The best thing to do is try a number of different strings and see which one sounds best on your ukulele. If you have a number of ukes you may find you prefer different brands or variations of strings because each ukulele reacts differently to the same strings. The only draw back is these strings take a while to stretch out and stay in tune, as do all nylon strings. But it’s worth it!