Like he said the 45 acp isn't a poor caliber it just doesn't stand head over heals over other calibers on every aspect.
Personally I like shooting the 45acp because I like the push recoil rather than the flip recoil of say the 9mm. My 45acp Kimber stays in my bedside table while my LCR 357 is my carry piece.
Every caliber has its good as well as its bad points. I have read a few reports written by doctors that usually patients shot by a caliber starting with a 4 were more apt to die than from a smaller caliber.
Shoot what you like because bottom line with any handgun is placement means more than caliber size. If you can control your caliber for better shot placement then have at it.