/sci/ - Science & Math

What electives should I take? I go to CU and am a mechanical engineer, and this is more or less what's offered:
>Sustainable Energy: Seems to be all about evaluating how energy is used in the economy and looking at different, sustainable forms of energy
>Soft Machines: All about soft machines, robotics, and the material science behind them.
>Combustion
>Failure of Engineering Materials
>Nanomaterials Class
>Feedback Control: Introduction to fundamental principles and techniques for analysis and synthesis of feedback control systems in the time and frequency domains.
>Introduction to Microfluids

Currently I enrolled in sustainable energy, soft machines, and some advanced calculus course, but I was thinking of dropping the sustainable energy class for combustion, and then tacking on that feedback control class in place of the calc. But it's hard for me to really figure out since I'm not quite sure what my passion is. I technically graduate at the end of this semester, but these electives all kinda feel "meh" to me, since the other semester has a robotics class and some other neat stuff.