Objective speaking,norther fat nor thin is the best. if you must ask which one better, i think in china the thin girl is more poupular.

there is more of it to love with fat girls

Well, you seem very beautiful.. so i don't think you should worry about popularity. You better try with finding good friends and a boyfriend if you want to xD

From what i hear thin girls get more dates, but I only heard this from others.