Suuuuuuper boring, but stock Cherry MX black. They are easy to find, cheap and have heavy springs stock. I go with them stock because after four or five years in the hobby, I kinda got tired of tracking down parts to frankenswitch and hate how lube can wear off inconsistently across the board, which necessitates relubing to get the consistency back.
I’ve tried a ton of switches over the years, but stock Mx blacks meet that sweet spot for me with good heavy linears, easy to find, and low time commitment to have them ready to go in a build.