Athletic is the winner in this group IMO.
Thin is nice, but I definitely am not attracted to skinny.
Thin with Assets is nice (although that chick doesn't look particularly cute), but usually assets like that get...ummm....."tired" as they age so that's something to be weary of IMO
I don't know if usually find "muscular girls" attractive, but the muscular girl in this example is fairly good looking except for her thighs, which are a bit too bulky (that and that's a competition photo, she wouldn't be that ripped 99% of the time, she probably usually looks like the athletic girl)
I don't see anything wrong with the average girl here, but sight unseen, average can mean a lot of things, so average is an iffy definition.
Voluptous is also one of those that can be good, but it can mean a lot of things and usually means "kind of big". Voluptuous usually turns into, thick/chubby as it gets older too.