Fruit

The Lubavitcer Rebbe said that man can live very well on bread, meat, vegetables, etc. However, one thing will be missing; sweetness! Therefore G-d gave us fruit to enjoy. (The rabbis of the Talmud state that one will be rebuked in the Heavenly court for each fruit that he abstained from enjoying.)
He said the same is with Judaism. One may study Tanach, Talmud, Halachah, but lack the sweetness. One needs to pursue those Torah studies that inspire and make sweet, along with the "basic nutrition" of those aspects that make up the framework of our actions.