I adore Boma, and I consider it the only worthwhile buffet on Disney property, especially for dinner. (The breakfast, while my favorite at Disney, is only a bit better than the average breakfast buffet.)
I could make an entire meal out of the soup bar and salad appetizers. The soups are absolutely fantastic, and I strongly recommend you try a spoonful of as many as you possibly can. Honestly, after the soups, the entrees feel secondary.
Which doesn't mean they aren't delicious! I like the nut-crusted salmon, in particular.
At Boma, diners are intended to graze -- you know, the like the animals in the savannah outside. Take a little taste of the breads and dips, a little salad, a little soup. To maximize your enjoyment, don't approach it the way you would a traditional table-service dinner, with defined courses and a protein-rich entree. You would miss out on Boma's greatest offerings.