Being in the Midwest and hunting everything that moves around here this is what my "Dream" arsenal would look like

12 gauge combo (for water fowl and slug barrel for deer)
20 gauge semi auto (for pheasant and quail)
.50 cal Black Powder
.22 (plinking and random varmints)
.223 (for yotes)
.308, M1A and Remington 40X, (deer, elk, moose, etc.)
Colt 1911 (range shooting, protection)

I dont think that there is anything else I "needed", but alot more that I would like to have lying around for the fun of it.