"there's no magic formula to playing the bass. it's a combination of skill, feel, luck, attitude, ability, hearing, emotion, physics, the moon's phase, and every thing else under the sun. there's no substitute for how it sounds, no one technique or one thing to focus on that makes a great bass line or a great bass player - it's all of it.
a couple tips for aspiring bassists: you gotta want to, and you have to be willing to put in the time and work at it.... AND have some fun. yes, have some fun ! fun is the one thing you'll always remember !