Quite the trip down memory lane...
King-Tappan painted sights on a Colt .45acp, followed by early Trijicon night sights on a duty S&W 4506 in the late 80s.
The majority of GLOCKs have some form of night sight: GLOCK 3 dot night sights years ago, up to the GLOCK BOLD sights which I like very much. Currently an Aimpoint ACRO backed up by Heinie suppressor sights. Warren/Sevigny 2 dot night sights, and “Big Dot” night sight on a snub. I am sentimental about two sets of gold bead sights(front) on a couple of GLOCKs. Quite honestly, the night sight helps me find the weapon in the dark. I really do prefer some sort of highlighting on the front sight, if not using a “red dot”. My personal dream in an “iron sight” would be a gold bead front with tritium tube, and a single tube in rear sight(yellow). No one has said they will build that. I continue to be optimistic about red dots-Aimpoint and Trijicon.
Short answer after all that: some form of tritium if at all possible on one piece of the sights for me, please.