Pink, all babies are different. My DS almost never cried, unless he was hungry or sick. He was such an easy baby.
My DD is a completely different story... cries when she's wet, when she's hungry, when she's tired, when she's not being held, when she is not getting 110% of my attention, when her milk's too cold, when she's bored - pretty much all the time! And just when I'm ready to give up, she'll smile and at me and say "mama" and it makes it all worth while.
Bottom line is, your baby may never cry or may cry all the time, and its not necessarily a reflection of your parenting skills, so when they cry don't take it personally. You'll be surprised how strong mommie instincts are!