I prefere Girl next door type to lift me. Not too muscular, not fat nor skiny. She should be firm, sporty girl but on a feminine way. For example an ammateur cyclist, swimmer, hiker or winter sports practitioner.
I like broad shoulders, visible biceps and triceps but not too big and not too defined arms, slim waist, flat stomach with visible, but not overexpressed abs, big, round but firm ass and short firm legs.