But I'm not sure it's a good thing. 
Well maybe not everything, but I think it's quite extensive.
I've been cracking my bones for years and the number of bones I was able to crack has grown over those years. Some nights however my knuckles will be really painful and I also sometimes get really bad lower-back pains (crippling), but that's completely random and could happen anytime, regardless of whether I've cracked my back or not.
I can crack:
Neck (left, right and backwards)
Nose (left and right sides)
Jaw (right side only)
Both Shoulders
Both Elbows
Both Wrists (in two different directions)
All of my knuckles closest to my wrist
The joints closest to my finger nails
Both Thumbs (they're not fingers you know?)
Both Hips (feels great at night when you get into bed)
Sternum
My lower back
Both Knees
Both Ankles
Both Pelvis'
Three toes on each foot, and
The big bone on the sole of my foot just below the big toe (mainly when I get up in the morning and I have to lean on it to crack it).
Is this common to be able to crack that many bones/joints or am I just a freak? :lol:
I also twitch ALOT (my wife thinks I may have Parkinsons) and sometimes the twitches kick in when I crack a certain bone or joint.