I have three lesbian friends:
#1 Is fairly stereotypically gay, likes stereotypically gay girls. Tom-boyish, shorth air, jeans, t-shirts, flat boobs.
#2 Is married with two [censored] and she's good looking (busty, easily a 36DD/E). She likes Jodie Foster lookalikes; smart, feminine - and she likes big-ish boobs on a woman, but not huge.
#3 Is an ordinary girl, fairly plain. To quote her: "I like the type of girls guys like." By that, she means glamourous, good looking, sexy, and with big breasts.
I'd say it's as varied as the preferences guys have.