I have to say that I'm in love with most of my basses. Just some more than others. Top of the heap right now are the Thunder Jet, the NR rehab, and the LP Signature.
I feel the same way. I have a number of basses, and I tend to like the one I have in my hands.
But only one of them has been mine for 41 years...my old '63 P. It doesn't sound "freakin' amazing" or anything like that, but it's light, has nice action, and I'm very sentimentally attached to it.
And here are the loves of my life, about 18 months ago...