Derivative control is cool but doesn't do anything interesting.
Proportional control is quite (i.e really) rubbish because at best it gets half way there.
Integral control is just weak and unstable.
PID is fairly bitching.

Despite PID being bitching I don't see why I should have to write any more about it than I just did.
Ergo, lab sucks.

UPDATE:
Oh, and whoever thought it would be just a brilliant idea to make us program the microprocessor in QBasic is clearly a complete idiotard. Hellooo, the eighties called and they want their crippled "programming language" back!