I hate: Smith & Wesson J-frame revolvers. I owned two in .38 special. They were always uncomfortable to shoot, even with regular-pressure ammo, and the two I owned had screws that liked to back out all the time. I fixed that problem with loctite, but wasn't pleased that the act of shooting rendered them "loose." And then the constant misfiring problem showed up.
I rented a 317 (22LR) once, and it had a superb trigger. The problem was, it shot at least 8" low and failed to fire at least once in every cylinder of ammo. I can hit the bullseye using .357 ammo with my SP-101 in double-action and experience no misfires, so it wasn't a problem with my shooting. This 317 was a piece of crap.
I love: Ruger SP-101. It's too small for a diet of .357, but it's perfect as a .38. It's 100% reliable with all of the ammo the J-frames choked on, as well as the +P stuff I gave up on with the J-frames. And it's a pleasure to shoot, even one-handed. I never got a "group" with my J-frames, but I get groups with the SP-101. Is that just me? Could be, but I doubt it.
I dislike: DA/SA pistols because of the two modes of trigger operation and the decocking step. I'd rather get used to a heavier trigger than learn two triggers on the same gun. I cannot even reach the decocking levers of our two DA pistols without resorting to the free hand. I don't like that. A decocker/manual safety is even worse. Even with the gun loaded and chambered, you've got four possible conditions: (1) decocked with the safety off, (2) decocked with the safety on, (3) cocked with the safety off, and (4) cocked with the safety on. That's just too damn many possibilities.
I love: Springfield XD. When loaded and chambered, there's only one condition ~ ready to fire. And, because there's a grip safety, you can rotate your thumb to the back of the slide and re-holster with no worry about snagging the trigger on your shirt and shooting yourself. That's why the Springfield is better than Glock and Smith & Wesson. It's ingenius.