Most important for me is reliability/dependability followed by UI then my preferences. At the end of the day, i can use 4k,5k 6k to see with. But if i have to click through lots of modes, strobes and discos, its a no no. Large or small, that would depend on use as well, the bottom line for me is light OTF every time i want it.
After that i need a nice beam, no fugly rings and green beams. I do like to enjoy using when i can, so preferences there are 4-5k in temp. Hi cri is a bonus, but not to come at the expense of too much yellow or off tints. In fact , some of my actual fav beams are 80+ cri.