Be awesome and don't do any sciences.
You're an idiot. You do 4U Mathematics, which is considered by most academic communities (i.e. universities) to be a science! However, maths is also an art.
I have examined textbooks for each preliminary and HSC science course, except for Earth and Environmental Science, which only dweebs seem to care about.
I have come to the conclusion that OUTSIDE of high school, physics is the best albeit most mathematical science, as it is according to UNSW and science teachers "the fundamental science" - it underpins all other science (except mathematics: physics makes use of maths but does not underpin it).
Purely at preliminary and HSC level, I have to say that Biology is the most interesting and practical, surgical science, e.g. you get to dissect a rat in prelim and brains and eyes in HSC if you do Communication. So if you don't flinch at the site of blood, I think almost anyone could agree that the best practicals are found in HSC Bio.
And oh, genetics! The maths that is required for hardcore genetics (not HSC-level) is mind-numbing, mind-blowing! Even at HSC level, a good Blueprint of Life question gets my mind chugging and makes me feel satisfied when I solve it. Genetics is lacking from the other courses, as is information about the human body...