I have a M637 and it's probably the gun I carry most frequently (in fact, I am carrying it now). The little factory grips and +P ammunition can make the Airweight quite a handful, so I changed out the boot grips for a pair of the grips from the M60 Pro and mostly shoot plain, ol' .38 Special through it (and, yes, both my J-frames are well past the 200-round mark). Now, my little revolver is quite manageable. I generally carry my J-frame with an HKS speedloader to give me a quick reload if needed.
I have had a wheelgun lock up on me exactly once and that was when I was firing some over-hot handloads through a M19 Combat Magnum. I have never had a revolver misbehave with factory ammo and I have put a lot of rounds downrange.
I have automatic pistols in both 9mm and .380 and I like them. However, I have pistols that are sized suitably to the round they're designed to handle. I have fired the LCP and found it unpleasant and, unlike my M637, there's not a lot you can do to make it any more pleasant. Frankly, unless your daily garb consists of a pair of speedos, I can't see any point in the LCP at all. Too many people on these forums brag about concealing an M1911 or a Glock for me to give give much weight to the argument that one of the "postage stamp" pistols is needed for concealed carry. I will admit I haven't fired a Kahr .40, but considering it's slightly smaller and weighs about the same as my 637, I am not sure how much fun that would be.
Incidentally, my 637 and Model 60 go to the range with me every trip. They get fired every trip, at least 50 rounds each.
Of course, I realize I am in the minority; Smith & Wesson wouldn't have come out with those silly Bodyguards if there wasn't a healthy market for undersized and underweight firearms. I did get a chuckle from S&W's promotional video for the Bodyguard .380; the guy is wearing a suit with a top coat: he could have been packing a S&W 500 or a Buntline Special and no one would have been able to tell.