From my own personal experience, the best "pocket" 9mm's that I've shot have been from Kahr's all metal series: the MK9, K9, and T9's. I've never had any of them require a break in or have any issues that would impair their function. The most trigger time that I've had on any of them is the K9 Elite, which is of slightly higher quality than the regular MK9 or K9 or even the T9. I've put roughly 3,000 rounds through my K9 without a hiccup, and it is a pleasure to shoot. The only potential knock against Kahrs is the trigger. It is striker fired but is long and heavy with a long reset like a DAO gun. The DAO-like trigger on Kahrs have been a turn-off for almost every shooter that has fired any of my Kahrs. New shooters tend to gravitate towards more "true"/classic striker triggers like the XDS or Glocks or single-action triggers. I'll admit that if I don't regularly practice with my Kahrs I have a harder time making hits with them, than I would with my XD (full-size). DA Revolver shooters will probably like the trigger on Kahrs. They are pretty smooth for a DA-esque trigger.
My experience with plastic framed Kahrs have not been as good. I've had trigger time on two CW9's, a P9, and a PM9. I had cycling issues with a CW9 and a PM9.
Oh, the other knock against Kahr's is that some of them have problems (or some people have problems) using an overhand rack or slingshotting the pistol with a full magazine causing a malfunction. Not all people or pistols will experience this problem--my K9 Elite does not, my old CW9 and P9 did. There are workarounds to this problem (using the slide lock instead of racking to load the first round, downloading magazines, or loading the first round without a magazine).
I'm not a fan of LCP's or LC9's or Smith & Wesson Bodyguards. They have even worse triggers than the Kahr series and in general, I find them to be snappier. The P9/CW9 and K9/K9 Elite series guns are of pleasant form factor to shoot. They are like taking a Glock 19 and making it a single-stack, so you have full sized sights and a complete grip four-fingered grip. T9/TP9's are another finger longer in the grip area, so if you have big hands or simply want a longer sight radius, they are good guns.
The PM9/CW9's are snappier to shoot than P9/CW9's. They are only 3-finger guns. Also a bonus feature of Kahrs is that they offer factory ported barrels for the P9/CW9 and K9/K9 Elite series guns, which makes them even more pleasant and controllable to shoot.
Finally, the XDS series guns are a bit heavy, and they are only 3-fingered guns, but they are nice to shoot. Of the above guns, they have the best trigger because they are more like a Glock or XD trigger, being a striker-fired gun without the DAO-like long trigger. I've found them to be easy to shoot, with pleasant recoil, and very accurate. The 9mm is very pleasant and probably the one I would recommend, but I was able to make headshots on a man-sized target quite easily with the .45 ACP version. The recoil is present in the .45 ACP XDS, but not really what I would call "snappy." It's just more of a "push."
If I had to break it down to two guns out of this rambling post, I'd say the XDS 9mm in 3.3" or 4" OR the Kahr K9/MK9. I'd also recommend the "Elite" Kahr models for the slightly better polish job and triggers.
Also, the new Glock 42 (in .380) and Glock 43 are worth looking into. They are slightly wider and heavier than their respective brothers in the plastic Kahr series pistols, but the triggers are likely easier to master much like the XDS series. Though there may be some "growing pains" with these pistols as there are with ANY new release by a manufacturer, they will likely turn out to be reliable and quality firearms.
Of the plastic models I've discussed, the XDS is the chunkiest coming in at all-steel Kahr K9 territory at 23 oz. The Glocks and Rugers are about the same weight per caliber, and the Kahrs are the lightest, per caliber.
OH, my only knocks against the S&W Bodyguard, Ruger LCP, and Ruger LC9 are the triggers and the snappiness. They are still reliable firearms, just not something that is fun to get good at shooting or things that make shooting easier when compared to other "better" "pocket" pistols.
NOTE: Only the Kahr P380 (which I have no experience with) and the Ruger LCP qualify as pocket pistols out of this bunch, at least as far as I would carry them.