Big strong AND fast is better, just sayin'! But regardless, the best teams generally have a mix. The mix is dependent on the talent available and the coach's philosophy. And on the professional level, there always are a few that have made a living despite being told they're too........something.
....but they are always looking for the "big strong power hitter" they think will win games with one swing. They will over look alot of things, like no speed, or poor defense, if they put a couple in the woods.