Albums:
Bon Jovi: She Don't Know Me
7800° Fahrenheit: King of the Mountain
Slippery When Wet: Never Say Goodbye
New Jersey: I like them all
Keep The Faith: Blame it on the Love of Rock and Roll
These Days: Damned
Crush: She's a Mystery
Bounce: All About Loving You
Have A Nice Day: Complicated
Lost Highway: Summertime
The Circle: Happy Now (though I dislike a lot of this album, hard to pick one worst)
What About Now: Army of One (but this album is so new, it's hard to say at this point)

Compilations:
Crossroad: I like them all
One Wild Night: listened to it once, can't judge which is worst
This Left Feels Right: haven't listened to it in so long I don't remember
100 000 000 Bon Jovi Fans Can't Be Wrong: Billy
Greatest Hits: We Weren't Born to Follow

Jon solo:
Blaze Of Glory: I like them all
Destination Anywhere: I like them all

Richie solo:
Stranger In This Town: River of Love
Undiscovered Soul: listened to it twice, no least favorite
Aftermath Of The Lowdown: listened to it once, no least favorite

David Bryan solo:
On A Full Moon/Lunar Eclipse: Midnight Voodoo