Do you really think your T would say something negative about your appearance? Of course not. You are paying her and if she said you were fat or ugly or stupid or ___, it would effect the relationship negatively. T's are very good at finding something positive to respond to "You hair is lovely in that picture" or "75% of the country is overweight" or "Most women your age are overweight".....

What you are really looking for is her approval of you. You are trying to "get that feeling you want" from your T.

Perhaps you should look inside yourself and assess why you are judgmental towards others, when they don't measure up to your standards or desires (ie judgment of your T being too thin, or wearing the wrong outfit, etc. or judgement of others) instead of trying to get your T to say what you want to hear.