9mm - Relatively inexpensive and pretty common.
45. ACP - I've aways been a .45 fan.
.223 - Same as 9mm: relatively inexpensive and common.
12 gauge - Very common and wide variety of loads.
30-06 - Great range.
__________________ “If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams
I'd have to include the odd ball 7.7mm Japanese. I just can't let go of my Grandpa's prized WWII trophy. That and it's PAINFULLY fun to shoot. (the story behind how he got it alone gets it on the list)