Your "handle" is what used to be heard called out frequently in the halls of my Chicago junior high school in 1963-4.
After shooting the H&K USPs rather extensively, I've been sufficiently impressed that I've ordered 2 of them (in Variants 2 & 10, since I'm left-handed) in 45acp. They ARE rather "blocky", and given the gun's size, I'd rather have the larger caliber, since in 9mm, the weapon isn't "size-efficient". (The concept refers to the size of the gun being no bigger than necessary to permit efficient use, including controlability, accuracy-precision, and concealability, for the size of the cartridge fired.) Smaller, more size-efficient guns are available in 9mm, including H&K's own excellent P7M8, though in .40S&W and 45acp, the USP Compacts really appeal. I've found them to be quite acceptably accurate and precise, in spite of the fact that (like Glocks but unlike SigSauers) the barrel-to-slide fit is a tad loose. If you have large hands, the standard size USP may be better for you, but I'd recommend shooting both sizes in all 3 calibers (9mm, .40S&W, 45acp), if you haven't already done so. (.357Sig is also available, but only in the Compact version, for some reason.) The bigger versions are nice, too (Mark 23, Tactical, Expert), but obviously not for CCW. Good luck.
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"Potius sero quam nunquam."