.45 in a full size 1911. I have other pistols in other calibers but nothing feels as good on the belt as my 1911.
I have been seriously considering a snubby wheel gun as a BUG a lot lately, just haven't decided what I want yet.
.380 pocket carry in summer. .45 or 9mm under jacket or IWB in fall/winter/spring. I carry a .22 around my own property (never know when I might feel the urge to plink - great benefit of living in the country)