I can relate to your story as I have gone through similar cycles of favorite carry guns. When you have several alternatives that you can choose, you tend to bounce back and forth, as each one has its pros and cons.
The 1911, especially the Commander size, is one of the more attractive carry guns out there from the standpoint of grip ergonomics, trigger feel, thin profile, good caliber, accuracy and good looks. I have a Kimber CDP Pro, similar to your Commander, that seems just about perfect in many respects. Sometimes I will be lured away by a Glock, Sig, H&K or S&W revolver, but I keep coming back to the Kimber.