Same as the original poster but in another order: .45 ACP, .38 Special then .357 Magnum.
I don't shoot a lot of .38 Special any more, mostly a couple of Model 642's. I guess I have so many of them because S&W has made them in such a bewildering array of models, styles, sights, finishes and barrel lengths. I shoot more .45 ACP than anything else. It's both my work and pleasure workhorse. .44 Special is second. When I get more time to go shooting, I'll go back to shooting a lot of .22 LR.
Rifles, it's .308 Win./ 7.62x51 hands down. I am a big fan of the FN-FAL rifle and had 14 different variants before I began thinning the herd, besides M-14 sporters and HK-91's and clones, plus some bolt guns.
I haven't fired a shotgun in 5 or 10 years now, I think.