What next?

I've finished singe variable calculus and I want a taste of pure mathematics before I go to university next September. I'm going to get a grasp of sets and proof first but what next? Number theory, analysis or what? Book recommendations would be ideal!

>>10
I did all the 100 and 200 maths (the math versions too, not the life science version) and got an A in every one of them (except for the B+ in Calc I, LOL).

Anyways, the point here is that both can be as hard as you want them to be, it's just biochemistry and cell biology are more useful and financially rewarding than pure maths.

If you like math do engineering.  That way someone will care when you're dead.