I love lots of things they do, but it is mostly in the story they tell.
Traditional village homvies:, showcasing our traditional stories, putting us in traditional clothes, decorating us in with traditional makeup, having us dance in traditional ways to traditional songs (e.g My father's love, Royal package, only love, royal palace, etc, etc). I love our traditional stories because it is very uniquely African and can't be duplicated by any other culture because it isn't any where else. It is wonderful to be able to see the bygone eras of Nigeria/African stories on films and be able to own copies for posterity. Our ancestors's verbal stories are finally coming to life, looking forward to seeing more and more of them.
Romance stories: Telling African or Nigerian romance from the African view, even showing the confusion or assimilation as we blend the Nigerian ideas with the westernized ways we are adopting into our world. The battles between the generation and the changing ideas of love/relationships that creates the battles.
Drama: Telling African stories that showcase our very African traditions and ideas. The wine-carrying, the dowries, the roles of husband and wifes, the respect of the elders. Why and when men kneel before their wives and why and when wives kneel before their husbands. When children argue and fight their parents and why they do.
The idioms, sayings, wisdoms of the elders, proverbs, peoms, etc that pepper our movies, spoken by the young and the old. It does not matter whether they are in the village or in the cities.
the Lion is the lion, his tails, is his tail,
the serpent strikes just the same, and it is a clear warning to all,
the stubborn fly will surely follow the corpse to the grave,
the flower in our in-laws garden are to be cherished, loved and married,
our wife, is our wife even before the wedding,
our in-laws, are our in-laws when the relationship is understood,
and all so very, very Nigerian
Pidgin english, proper english and the local dialects: there is nothing like showing that we grow up bi/tri or morelingua, when a sophisticated, intelligent, well-bred adult goes back and forth between proper english and pidgin (and sometimes their native dialect) like one was born to it.
A different view of Nigeria or Africa: If one lives abroad the tendency is to think that Africa is always on the verge of dying from starvation, famine, something or the other. But see the movies and suddenly there is a different view of the life of an African. Yes, there are road, rich homes and laughter.
Most importantly because this is not 419, corruption, robbery or drugs...

For carrying the flag on a positive trend and allowing naija's hold their head high for something good.
Una well done. And this is bigger than you all and Nollywood.
I am sure there is more I can come up with and I will update as I remember. Meanwhile
Kudos Nollywood.