The format that wins a featured snippet is whichever one matches the shape of the answer the query demands: a paragraph for definitions and why-questions, a list for steps or rankings, and a table for comparisons or specs. You do not get to choose the format freely and then optimize it; the answer type dictates it. Google pulls the snippet format that best presents the kind of answer the searcher needs, so the winning move is to identify the answer’s shape first and let that select the format, rather than reaching for whichever format you have heard performs best.
A paragraph wins when the answer is explanatory. Definitions, “what is” and “why” questions, and anything that resolves into a concise statement of meaning or cause are best carried by a short, self-contained block of prose. The searcher wants a sentence or two that settles the question, and Google extracts a tight paragraph to deliver it. Forcing this kind of answer into a list would fragment a thought that is naturally continuous.
A list wins when the answer is sequential or enumerable. Step-by-step processes, “how to” tasks, rankings, and any answer that is genuinely a set of discrete items belong in an ordered or unordered list, and that is the format Google tends to surface for them. The shape of the answer is a series of points, so the snippet that wins is the one that presents it as a series of points.
A table wins when the answer is comparative or structured by attributes. Side-by-side comparisons, specs, pricing across options, and data that lives in rows and columns are best read as a table, and Google will lift a real table into the snippet when the query calls for that shape. An answer organized along two dimensions wants a grid, and prose or a flat list would obscure the relationships a table makes instant.
This is why the blanket advice to use lists to win snippets misleads. Lists win list-shaped answers and lose to paragraphs and tables on questions those formats fit better. The selection rule is not a favorite format; it is a reading of the answer.
So before you build a snippet-targeting answer, look at the query and name the shape of its answer: is it a definition, a sequence, or a comparison. Pick the paragraph, list, or table that matches that shape, because the format that wins is the one the answer type already chose for you.