My #1 is a Frankenbass. It combines my love for:
-Peavey T-40
-T-40 neck shape and P-necks in general
-the Lakland Decade and Wal body shapes
-Dark strait grained wood
-Big Shiny chrome hardware
-Dark Star pickups
-Neck position pickups
It started out life as a Peavey T-40 with a set of darkstars and then I had a local luthier make a custom body and a metal nut for it. We worked together on the design to make something with bits of Wal and Decade and some SG style diamond cuts. After I refinished the neck to satin poly, finished the body and assembled it, it was my main player for a couple years until I realized the string alignment wasn't perfect (my fault). It almost fell off the list until I brought it to my new luthier. They moved the bridge and set it up. It's now strait as an arrow, plays like butter and of course it sounds amazing.
My '79 T-40 puts up some stiff competition, but I've yet to find a bass that speaks to me sonically the way this one does.
More pics and info here:
My new T-40/Wal/Decade'ish Frankenbass