To me the worse of each album are:

Bon Jovi: Hard, I'd have to go with Breakout.
7800° Fahrenheit: King Of The Mountain.
Slippery When Wet: Social Disease.
New Jersey: I'd say "Ride Cowboy Ride", but I consider it an introduction of a song more than an actual one. I love the rest of the songs as is my favourite album. I choose 99 In The Shade.
Keep The Faith: Woman In Love.
These Days: Uh, this is hard. If That's What It Takes.
Crush: I Got The Girl.
Bounce: One of my favourites album ever, I love every song. I'd have to go for Love Me Back To Life with Hook Me Up as a close second.
Have A Nice Day: Last Cigarette.
Lost Highway: Really hard as I love this album. I Love This Town.
The Circle: Fast Cars.
What About Now: The Fighter.