I was a "biceps" man when I first got hooked on female muscle back in the 1980s, now very much a "pecs" man (not breast implants for the most part, just juicy chest muscles). Always difficult to choose further down the list, but I'll try:
1. Chest (pecs - yummy! Examples - Colette Guimond, Paula Suzuki, Kim Perez; size - Cornelia Brandt, Heather Darling, Christine Envall)
2. Arms (BIGGG! - Tina Lockwood, Kim Perez, Cornelia Brandt, Heather Darling and of course, the great Renee Toney)
3. Back (nice and wide with a great "V-taper" - Cornelia Brandt [size], Andrulla Blanchette [v-taper])
4. Legs (big and shapely quads/hams/calves - Tina Lockwood, Heather Armbrust, Marja Lehtonen)
5. Overall "look" - a really balanced physique with great muscle shape/curves who knows how to show it off to the best effect (e.g. Denise Rutkowski, Andrulla Blanchette).
6. Face (beauty [Jennifer Abrams]/sexy [Christine Roth]/fun-loving, happy and playful [Andrulla Blanchette])
7. Glutes (Luciana Andrade, Colette Guimond, Heather Lee)
8. Abs (many, I live Alina's abs at contest-time at the moment)
9. Neck/traps (Sue Scheppele)
10. Other i) Voice - it depends on the woman - some prettier FBBs I like the sweet feminine voice, other, bigger ones (e.g. Lora Ottenad), I like the deep voice - it just seems a good fit for them.
11. Other ii) Armpit/arm/delts/obliques tie-in - can be really sexy if well developed.