It is correct and usable in written English.
You can use it when you are expressing a preference for something. Example: I usually prefer Mexican food to Italian food.
I usually prefer beer with my dumplings, but the restaurant offers an extensive wine list.
I usually prefer pared-back menus but this feels rigid and lacking in imagination.
(I usually prefer to froth up a sour with egg whites, but we'll leave them out of the parking lot).
The editor who worked on the excerpt, Amy Virshup, puts it this way: "I don't love doing excerpts – I usually prefer our own reporting.
As a reader, I usually prefer to read about the Shackletons of the world, the Clares and Williams of the heart.
Somehow, the idyllic Alpine villages that I usually prefer, like St. Anton in Austria, with their cute chalets, bottomless fondues and Edelweiss-themed kitsch, seemed inappropriate.
This decision was based on a belief I formed about myself as a child in the nineteen-eighties: some people, I saw, really liked to read novels about foster children who had flashbacks to terrible encounters with pedophiles or other abusers, but I usually preferred books that were about other things.
While I'd usually prefer a selection of small plates — which best show off the chef's creativity — it would be sinful to skip any of the above-mentioned entrees.
(Gypsies usually prefer to be called "Rom," or "Roma").
They usually prefer to resolve cases through a negotiated settlement.
But they usually prefer to use machines, not employ people.
