My absolute favorite mascara is Bare Escentuals Big Tease mascara. This is the best stuff I've ever used. I do also like Mary Kay's mascara, but I still like Big Tease the best.
Wow, what a response! Thank you to everyone for your suggestions - I never thought of Mary Kay for mascara, which a few of you mentioned. I am going to make a big list and try them all - If I can't find something from all of these responses, I better stop looking!