Yes. Like them, enjoy shooting them. Don't collect them.
I am defining "mousegun" rather broadly here. The guns I have enjoyed most in this category are not miniscule pocket guns, but compact, well made firearms in small centerfire calibers.
I am fond of the
.32 H&R Magnum. Accurate and fun. I used to own a Ruger SP101 in this caliber. Great revolver with basically zero recoil (albeit a sharp little
crack!). But the ammo is expensive, and I'm not set up to reload. It wasn't really a carry piece (it would make a nice house gun for someone recoil sensitive), and I had to sell mine a while back to fund a more utilitarian gun purchase.
Still miss it.
One of these days I'd love to get a nice little old sixgun in the
.32 S&W Long chambering. Something like this:
http://www.gunblast.com/Cumpston_32Colt.htm
I also enjoy quality semi-auto pistols in the
.380 ACP caliber. My Bersa Thunder is accurate and reliable, with a pleasant trigger. New shooters really take to it when I bring 'em to the range. It was a steal for under $250.
Of course, many do not consider a .380 a "mousegun," and I certainly don't mean to impugn anyone's carry or backup piece. While my personal minimum for defense is .38 Special +P, there is some well-designed .380 ACP ammo out there by companies such as Cor-Bon and Black Hills.
One gun writer whose byline I check for is R.K. Campbell of Gun Week, Gunblast.com, and Women & Guns. He had an enjoyable article on the old CZ 27 pistol in .32 ACP caliber a few months ago:
http://www.gunblast.com/RKCampbell_CZ27.htm
That's another example of the kind of "mousegun" I like - a quality compact piece, like a little service handgun, shooting a cartridge that is rather demure by contemporary American standards, but still fun to shoot and relax with.