I went back to full size guns about a year ago and never looked back. I carry a M&P9 and shoot a M&P40 Pro at local matches. I love 1911's but enjoy my 17+1 9mm more for many reasons. The M&P's feel a bit like a 1911 to me anyhow.
Looking at getting into a Sig P226 Tacops in .40sw but I doubt I will ever give up my everyday M&P and surefire light/knife combo.
Those M&P pistols just feel too damn natural to me! Love em!