Firstly, unless your a card magician, I don't think you should present ten card tricks everytime you perform. Unless you have a very dynamic personality, or again, you are a card magician, your set should be a little more varied than that.
Secondly, this is a question that can't be answered. What makes magic so good is that it is an individual endeavour, and everybody has individual tastes. If we all did the same card tricks, none of us would be individual and magic would become complete tripe.
Classics can include - The Ambitious Card, Triumph and Card on Ceiling, but none of these are must haves for a performer. No effect is a must-have for a magician, and anyone who thinks that is a stick in mud.
Ty
(Please don't think I was being rude, I was merely sharing my thoughts. All the best)