Whoo-eee. Dittos on Zappa. And I can see the Dan being something of an acquired taste. But Diana Krall? I'm not the biggest fan, but I don't see what's NOT to "get" about a female jazz singer-piano player.
Still, I hasten to add, there are some artists I initially didn't "get" and later found myself scrambling to buy virtually EVERYTHING in their discography. To wit: Elvis Costello. Initially, I was like, "Huh? Strange time signatures, awkward/syncopated rhythms, crazy chord changes and indecipherable lyrics, etc., etc." Then I got "My Aim Is True," and wow. Wow! Not for everybody, I know, but it works for me. I can say the same about Bruce Springsteen... (*but I digress .... maybe I'll start another thread)
I suspect there many who read this thread and go, "Hell yeah! That guy/gal is TOTAL CRAP!" and then "What!?! He/She's a GENIUS!!! What are you THINKING!" There's simply no accounting for taste. Ever.