PPS and P99
I owned a Walther PPS, and couldn't warm up to it. There was a good amount of recoil and it didnt fit my hands very well.
Remember that the PPS is a relatively small and rather slim single-stack designed for concealed carry. It won't fit everyone's hand but it does give you some options. The different magazine extensions change it between a three-fingered grip, a two-fingered grip, and a sort of 2.5-fingered grip. It also has changeable backstraps. In 9mm, the recoil isn't bad and I thought it handled very well for its size. The trigger was decent and I really liked the paddle release.
Sadly, I made the mistake of buying one in .40 on a whim. While great in 9mm, the .40 version was too snappy and my accuracy suffered. I know I could have trained around it but it was just too unpleasant for me to care. I ended up selling it.
I've handled a P99c Anti Stress (AS) a couple of times, and the trigger is amazing. You have multiple ways to carry it with the trigger system, and the SA pull is perfect for a polymer pistol...
I never tried the compact model but the P99 is a great pistol. The contours are both attractive and good for carry. It's quite ergonomic and with the changeable backstraps, most people should be able to find a decent grip. It's worth noting that it was an early foray into pistol ergonomics and that while the initial design is almost two decades old, it remains one of the most comfortable handguns on the market.
The trigger really is exceptional in single-action. The double-action pull is long but smooth and not too heavy, with good tactile feedback. (So much so that it's easy and tempting to stage the trigger on a DA shot, prompting Walther to put a liability warning on it in
the manual.) The "AS" mode is a curious novelty but it seems like most people just use them as a standard DA/SA pistol. Speaking of novelty, the P99 is a striker-fired DA/SA with a decocker.
It shoots well in 9mm and once you warm up to the paddle release, you might be hooked.