For me it’s a two way tie between my two current basses. Which sounds silly until you realize they are the survivors out of a field of six.
If my SBV-550 didn’t have slight neck dive it would be #1.
Just so unusual and cool, and feels amazing. Super high quality bass. Love the Blue and White too. Great P/J tone.
And then my trusty TRBX604. Ancient pic, still had a clip-on tuner 
I just love everything about this bass - weight, feel, tone, looks. Neck and pickups are amazing, preamp is good, very high quality instrument. So good. Really bonded with it.