I wear cargo shorts, so anything will fit in my pockets. In my case, that answer could be “anything I feel like”.
But, if I had to choose, I seem to often reach for my XCon Pro. I don’t often get my Aoda Littles out. The Token is fantastic, so that might be a logical choice. I have 2 Dingos, which rock because of their slim design really makes them pocket friendly and are “one Drop smooth” as you’'d expect.
I’m hoping one day I can say “The Mighty Flea”. I have one, so it’s an option. I just cannot use it yet in a manner where I can perform any tricks with it.
Honestly, my preferences towards full-sized are very strong so I just load up the pockets with stuff I enjoy. Also, I carry a yoyo holder and my YYE Medium bag, so I’m usually not at a loss for items to swap out.