Am I the only one who think that CPU's need to be made smaller. I think that people are more interested in the size of monitor and much the size of the CPU.

Let's try to clear this up, what CPU are you referring to, the processor or the computer casing. Some people name the computer casing as CPU.

Regarding CPU as computer casing, the bigger the size the better for me because the ventilation will be much cooler.

About CPU as the processor, I wouldn't care that much. What I care about is the speed of the processor and not the size of it. Besides most processors have the same size.