Personally I prefer LF/Standard birds. It's all about your amount of land and your location as well as preference, but, I like "standard" sized birds better no matter my space or location, because most bantams have ugly eyes and heads in my opinion, have way too dropped of wings and short, U shaped backs which obviously says something wrong about the body, and most bantams are a miniaturized version of a normally large breed, which to me isn't entirely natural.
Um, breeds in general aren't "natural" are they, roosters in the wild dont mate with specific hens to get chicks with specfic characteristics!