FWIW, I've found I prefer mine in the 5000K range (daylight, ~ noon IIRC). The unfortunate side, is this seems to be more difficult to find, and tends to be more expensive when you do.
Warmer, say 3000 - 3200K is fine for normal household lighting is fine (i.e. concerned about tripping over the cat, finding my way to the kitchen, ...). No pain at any rate, but not wonderful for fine detail IME. For detailed work such as soldering, probing and such on an electronics bench, warm doesn't cut it for me. And the bluish shade of 6000 - 6500K I don't care for at all (actually causes me some eye strain/pain, and will develop into headaches if I don't get away from it). Discovered by accident per se, that 5000K works best for me (literally grabbed the wrong bulb once, and been hooked ever since).
YMMV though, and as mentioned is subjective.