1.- Pecs. Someone said Colette?
2.- Traps. Elena Oana is the Queen!!!
3.- Lats. An da Jeong is a goddess

 ripped quads (just ahead of 6 pack)

The only thing better than a great six pack is Bonnie Priest's eight 8 pack.

The first thing I notice on any woman is her butt.  Women bodybuilders  have such big firm butts.  Im thinking Lesa Lewis,Cindy Landholt and Kim Chizevsky  most of all but Suzan Kaminga  also has a well formed glutes.

Oh thats easy....glutes.

I like pecs and lats! 

Legs - especially thighs both quads and hamstrings

Glutes all day; Alina Popa, Betty Viana, Andrea Shaw, Dorothy Trojanowicz, Lola Montez, Penpraghi type glutes. Also, have a thing for toned arms on a lady

Give me a sexy six pack

There’s nothing better than a woman with big strong thighs, quads, glutes

Eh, how about... my preferred muscle would change with the ebb and flow of the girl's flex??

I find the entire body of a muscular girl more powerful than a drug. If you want to talk strictly preferences, and force me at gun-point to PICK ONE, and ONLY ONEEE!! Um, I'd still be fighting with indecision, between abs, a girl's armpits, glutes, quads, or overal core. Last second, before you pull the trigger, I'd shout from the innerest crevices of my soul..... "ABS, NOO THE ASS!! NOOO MAKE THAT THE ABS/CORE!! ACK, SHOOT ME, THIS IS TORTURREEE!!!! Gwhaa" I'd be rendered into a crybaby, toughest choice ever.

FYI, heck, the saddness that breasts are fat and that ultrafit women will shed breasts, is one of the things that pains me. Because my ideal fantasy is supremely muscular women with equally gigantic bosom mounted over steel-plated pecs. My brain has this elaborate city palace where muscle women live in a strict hierarchy. The more muscular/busty essentially queens, and those that can't compete like hiding in maze like alleys for fear of being crushed by the superior ladies in the hierarchy...

 
So, this type of questions, man, they really are tough, because makes me trigger that inner brain catalogue of images that I have....

I'll jump straight to it.legs has been my favs for a long time.but I'm starting to admire other parts to.eg . shoulders,full meaty pecs,just look at Nancy lewis, marvellous margie

For me it's sexy muscular thighs (vika pogribnyak or valentina mishina) followed by six pack abs (guluzar)

I find that different parts change for me depending on how I’m feeling. I mean I love a really rock hard butt, but could strong legs and abs all day long sometimes. Seeing the striating though and vascularisation though is totally hot.

biceps and traps