Despite being the first handgun I ever shot I still don't like the .40 caliber. Some people are big fans while others avoid it like the plague. I was looking at used HKs at my LGS (local gun store) and I was surprised how many they had available. I said to the guy behind the counter, "wow, you've got a lot of USPs back there." His response, "Yea, but they're all .40s. I need a .40 like I need a fat chick."

There are 3 main reasons why I don't like the .40 caliber:

1. It's a high pressure round that wears the gun faster
2. The recoil is snappier than a 9mm but less predictable than a .45
3. It's another caliber of ammo to have to stock

For the most part, .40 caliber guns hold their value. There are enough .40 fans out there to buy them and that's great news if you own one. For me, I either want a 9mm or a .45 ACP. I never saw the value of "having the best of both worlds" as .40 caliber fans tend to say.