I hate, despise, LOATHE DA/SA pistols, esp those with no safeties/ability to be safely carried cocked-and-locked. Learning a manual of arms to the degree needed for it to be instinctual for you under duress can be difficult enough. It makes sense to me to keep things as simple and intuitive as possible. Putting two separate, distinct trigger pulls on the same pistol is flat out retarded and only complicates the training process. Then as if to add insult to injury, the DA pull still gives you all that creep and slack to take up before the SA pull kicks in. And most DA/SA autos exacerbate the problem with already long and gritty pulls. It's like intentionally making it as difficult to interface with this platform as possible. I am not a trigger snob. Anything not obnoxiously long and heavy is fine with me. Case and point, I like Glocks. I've never had a problem with the trigger on Glock. It's light enough to be usable, but not so light as to be a liability. There's no safety, which makes manual of arms that much simpler, instead of unnecessarily complicated, seemingly just for the fun of it. Because I use and train primarily with my Glock now, I know Rule III is non-negotiable--my finger doesn't even go in the trigger guard until the pistol is level in front of me and the sights are on target. And again, it's the exact same every time, so I only have to memorize and develop muscle memory for one set of actions. The trigger finger stays along the frame and is actually used to point towards the target as the pistol is pushed out in front of me, helping me find my sights faster and making aiming the pistol more instinctual. Very simple. Keep it simple.
The only hammer guns I've ever like then have been the one's I can carry cocked and locked. And they've been carried cocked and locked exclusively. I've never bothered to fire a single DA round through my HK. Not a one. No need for a decocker, and the pistol is still hampered by the DA pull even in SA mode, so none for me. Make mine a SAO. Pretty much, make my hammer gun a 1911. Not too difficult to master. But still, my complaints with it have more to do with it's weight vs firepower and its cost. A full size service auto that weighs close to 40 oz unloaded should have more than 9 rounds, IMO. I have a G20 with 15+1 rounds of full power 10mm Auto, and it fits into a platform of roughly similar dimensions that is over half a pound lighter when unloaded. And it cost half as much as any reputable 1911 with the features I was looking for.
So I didn't end up with a Glock because it is striker fired. I really have very little preference on the issue. I ended up with a Glock for other reasons, and just so happen to find it being striker fired perfectly acceptable.
Advantages that a hammer equipped gun has over a striker fired on:
1. When you holster a hammer equipped DA/SA pistol, you place you [sic] thumb on the hammer. This cues you if something, usually a safety strap or clothing, gets into the trigger guard and forces the trigger back as you insert it into the holster.
I'm not saying this is impossible because someone is always designing a better idiot, but I am saying that if you manage to pull this off with your Glock, you deserve to be shot and I hope it hurts.
I cleared and triple checked my Glock 20 to attempt and induce this with the thumb break on my el' cheapo Uncle Mikes. The pistol has a completely stock Glock trigger, and was cocked (well, as cocked as Glock triggers get at rest), and man I tried. Just wasn't happening. So before declaring the myth busted, I took a patently Mythbusters approach and decided to see just what was necessary to achieve the result. Initially, I only managed to accomplish it with the holster off my body. Once I realized what had to happen--the stiff shorter molded plastic piece had to slide in perpendicular to the trigger, and barely fit in I should note, so the pistol had to be almost parallel to the deck. So I put the holster back on and discovered that no, oh, yep, it really is possible to bend my wrist at that angle, but it feels so unnatural and awkward, and requires the pistol to be oriented directly into the shooter, so I really have no sympathy for anyone that actually manages to pull it off.