Well, I voted "legs" but really different guys over the years have gotten my attention with all of the above.
And, if it had been an option I would have voted for shoulders, or lower abs between navel and pubes.
Among the choices provided, love a strong chest and muscular legs. Nothing like cuddling up to a guy with nice pics and grabbing some thicc thighs while enjoying other things
Sexually I have no attraction to any part of a male except a big cock
Now, in a non-sexual manner.... as a bodybuilding fan its cool to see huge delts, round and capped. Back also. I have a huge back so I always respect a guy that has one also.