AR's and 10mm.
I have 6 completed AR's. I have in AR 15 one pistol, one carbine and one rifle in 556, another carbine in 300 blckout, an AR-10 carbine in 358 Win and an AR-10 rifle in 308. I have an AR15 rifle build almost complete for CMP service rifle match as well. In addition, there are two complete AR carbines that belong to my 16 and 14 yr olds, a complete AR lower that belongs to my 11 yr old, and three stipped lowers that belong to my other three kids. I have an additional 10 or so stripped lowers that are waiting on builds.
10mm's are the dominant pistol. Two Glocks, a Gen 3 20 SF and a G29, two Witness guns, a standard full size and an elite match, and a Para P16/10mm. I also have a Para P12 with an STI commander slide and a 10mm Schuemans barrel that I need to get finished and running.
There is a fair patchwork of other guns too, but these are the dominant flavors.