I Prefer..

my car
I prefer driving with my lights on always, to not on.

always on

I prefer ham to salami

ham
I prefer chicken to turkey.

turkey

I prefer Smartfood to Cracker Jack.

Are we talking caramel corn? Not familiar with Smartfood but I like Cracker Jack.

I prefer OJ with calcium added to regular OJ.

OJ with calcium added since I can't stand milk.

I prefer frozen yogurt to creamy yogurt.

(Can't stand milk either, xmaskat... :ohno)
frozen yogurt
I prefer vanilla ice cream to strawberry.

vanilla

I prefer a hot fudge sundae to a chocolate sundae.

hot fudge
I prefer an eye exam to a dental exam.

eye exam

I prefer mashed potatoes to baked potatoes