Marlin Camp Carbines.
The 1911. Not 1911A1, not the "kustom krap" that every manufacturer and their pet hamster is putting out nowadays, but the original, non-checkered, long triggered, original configuration.
Decent-powered, inexpensive (say, $25 a box of 50) 7.62 Nagant ammo.
M1903A4s, M1Ds, and G43s.
Second-generation Glocks. The finger grooves ruined it all for me.