I seem to be the exception to the rule - of the three custom builds I've had built for me I still have all three. Admittedly one comes out very rarely but the two that @Andyjr1515 built for me get used regularly and are firm favourites with visitors to my home.
I've actually been more disappointed by factory basses. My first Ray (1996, mutes and figured maple) was a dream to play but I sold it here to fund something else. Shortly after I bought a 2006 to replace it, seriously disappointing - none of the previous assets and felt "average".
Recently bought a G&L M2000, loved it but sold it as part of my downsizing - sellers remorse so bought a G&L Jazz - didn't have the same "oomph".