My favorite .45 is my CZ97B. My Beretta Cougar 8045 is better for CCW but for pure shooting pleasure and accuracy the CZ gets the nod. I'm starting to wonder why I ever bought the HK USP .45 as all it seems to do anymore is sit in the safe.
My favorite is my carry gun; a '94 vintage Springfield Mil-Spec to which I've added Ed Brown Thumb and Grip safeties & Hammer and a Videki long alum. trigger. It ain't beautiful but it works first time and every time.
A 1911 (not A1) Government Issued Remington UMC. Was once a target pistol, but has been restored to original looking condition. (Except has functional sights, slightly bigger than original.)
Next favorite 45 is a 1917 S&W revolver. It's cut down for ease of carry.