Nope. I’m not in girl-mode currently, and don’t understand the appeal of wearing panties/etc. under my regular day-to-day guy-mode clothes at all. I think the only time I’ve ever left panties on when I went back to guy-mode was when I just had to run to the store for something really quick (in the middle of the day, when I don’t go out dressed) and knew I was going to dress up again when I came back. And even then I was worried my pants might sag enough that the panties would be noticeable. Probably won’t do that again for that reason.
I either dress up all the way or not at all, pretty much. I don’t really like the “in-between.”