Cool thread idea! You said "We all have one... or five!" Well, I have eight that I really like. However, for the sake of bandwidth, I'll share my absolute most-used/favorites.
The first is a '65 Jazz Fest. Sometimes I just sit down and play nothing but this drum for several minutes before I show any love to the rest of the kit. The second is a '64ish Slingerland COB that is on my rehearsal kit, so it gets played a lot. The third is an early 40s 7x14 (actually closer to 7.25" deep) Radio King, which is probably my favorite, but I don't play as much as I'd like to for various reasons. Finally, the fourth is a 6x13 MoJoe Custom that my friend Joe Partridge built for me in 2004. It is a stave drum made of canarywood with purpleheart bands and seems to be the favorite of several guys I've played with over the years, probably because it's loud and dry.
Lynn