I prefer the stock sights that come with the gun in most cases and I prefer them to be iron (steel) sights. I dislike it very much, that several years ago, Glock switched to polymer sights on their pistols but I can live with it or change them.
I do not like fiber optic sights (I carry for self defense and do not want frail sights) nor do I like red dot, plastic orange ramps, night sights. I mean Trijicon and so on because I learned when and if the front sight fails, you are unable to use the sights in low light and believe me they can and do fail - luckily for me it was at the range. Anyway those types of night sights make it take longer to get a good on target sight picture when in low light situations. I've witnessed that over and over again hundreds of times with scores, if not hundreds, of shooters who used them when I had collateral duties as a LE firearms instructor. We timed the shooters, some took multiple seconds more to get sighted in while using them in low light training.
I also do not like battery operated sights on any defensive gun, that is unless there is the back up of iron sights or glass optics.
As for white dots or whatever versus plain black sights, the dots sure do help those older eyes of mine. I like white, no red or orange or zombie green.
What would be excellent on pistols, in my estimation would be something akin to Ghost Ring Sights (except for the fact they would require a whole new breed of holster I suppose). I wonder, do they make them for pistols?
Replying to the bolded parts... Glocks have had polymer sights for at least 20 years, but I think they've been plastic for at least 30+. Only Glocks I've ever had that came with steel, were when I bought them with night sights.
As for Ghost Rings for pistols - yes, they do.
Ghost Ring Night Sights | AMERIGLO.com
Get immediate front sight acquisition from a non-traditional night sights design: the AMERIGLO® Ghost Ring series.
ameriglo.com
No new holster necessary.