Where the Groove Is
One day you may realize all of the good-feeling rhythm stuff falls between the beats not on them. The beat serves as a reference point around which other rhythms dance.
Nearly all good basslines, regardless of style, contain rhythms falling in-between the beats. If you want to groove, you need to develop a strong sense of where these divisions of the beat fall. This will take practice, time, and experience. It’s frustrating for many in the beginning. Be patient and practice. Eventually you will feel these subdivisions without a thought.