G23 on days that end in Y. G23 in the months that start with a capitol letter. G23 in summer. G23 in winter. With a suit, jeans, gym shorts,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,well, you should have caught on by now.
G26 19X Although as much as I like my 19X, soon as I get a couple hundred more rounds through my G48 it is gonna take the place of it.
G43 and once every other blue moon my G30S*. *(Historically speaking. After years of faithful service, the G30S started choking on defensive loads. After changing mag springs, changing the RSA, and sending it to Glock to have every possible part replaced, it's improved but not 100%, so it has been shelved and replaced by an M&P40 2.0 Compact as my house and occasional carry gun.)
As others have said, because I am at work more than not, a G45, or G19.5FS. Rest of the time, a 43X or 43. TXPO
The two G19s. If by model, then the second carried is the G26, which I'll carry maybe 6 times a year.