I too much prefer iron sights on a handgun. I learned to shoot a handgun using iron sights, I spent 30 years in the Army shooting iron sights, I shot competition both in the Army and NRA with iron sights so most of my experience has been with iron sights. I do however much prefer adjustable iron sights to fixed. Throughout the years I have tried both scopes, which I found excessively bulky not to mention heavy as well as red dots. While red dots do add a bit of accuracy the drawbacks far outweigh the advantages. Getting used to drawing, finding the dot and finally getting it on target takes a lot of practice, and for me at least, slows down getting the first shot off. In a high stress situation it might take too long to find the dot, which would not be a good thing.
When initially getting training on the red dot, it was one on one with the instructor. He had me shooting at pie plates at 20 feet. He was shooting a Glock 17 with one of the high quality red dots on it with a Level II holster. During his demonstration of draw and fire, shooting the 5 plates against the clock he managed to draw and hit all 5 plated in 4.2 seconds. He hit the plates, but the hits were scattered on the plates. At that time I did not have a red dot on my M17. We were using his Glock for the training. I told him I could do better than that with iron sights. He challenged me to put the bullets where, as he put it, "My Pie Hole was." (X - Marine Gunny) I went to my car and brought out the M17, which he didn't much care for either (He, like me was a 1911 person) He did the timing, when the buzzer went off I drew and shot all 5 of the plates in 3.8 seconds, all the shots near the center of the plate. When I was done firing, he looked at the timer, then at the plates and simply said, "Nice job." then went back into his dissertation about the red dot. I finished up the training still unimpressed but due to company requirements at the time ended up putting a red dot on the M17. Several months later when on the range for our semi annual qualification I took out the M17, and found that the battery was dead and the red dot inoperable. That was when I took the red dot off, put the adjustable rear sights back on and never toyed with a red dot again.
I have an inherent mistrust of any sight system that relies on batteries. I do however make one exception and that is for laser sights. While laser sights are useless in bright sunlight or at distances over 50 feet, they redeem themselves in dim light as well as when close to your target. When sighted in correctly, the bullet is going to go where that little red or green dot (I prefer green) dot is when you pull the trigger. What this means in a combat situation is that as soon as the gun clears the holster and you put the dot on the target, you can start shooting without having to bring the handgun completely up and aim through the sights. This speeds up the first accurate shot to around 2 seconds or less and for those of us that are getting up there in the years makes shooting fast and accurately easy.
The one caveat is that the handgun and laser have to be the type where the laser turns on when you grasp the handgun to shoot. If you have to turn it on manually it is about useless for a self defense firearm. Crimson Trace has many of these available for both revolvers and semi autos. While I still defer to irons on most of my firearms, my carry gun, a Kimber Micro 9 is equipped with a laser (and thumb safety) Small enough to be able to hide almost anywhere, large enough to be able to grip easily and accurate enough out to 50 feet and with the thumb safety safe enough to hide anywhere.