Depends on your preference and if you have a supporting DoL or need to buy mats off MB. My preference is CUL only because I can farm my mats, where it makes sense, and craft the items. People may not agree on CUL, but the reason I do it is because food has a shelf life when used so it tends to move faster although at a lower cost.

Take a look at the MB, and make sure to check history. If an item has a ton of sellers, but many purchases chances are your stuff will still move even when the board is crowded. Now, if you find anything DoL related that has no sellers (1-2 star) that's where I make bank. I pull about a mil a day filling a single retainer with a combination of stacks and single item foods.