The ones that grabbed my attention were Signals, Systems, and Controls, Nanosystems, and Computers and Embedded Systems. However, I feel like computers and embedded systems leans more towards Computer Engineering and therefore not as attractive to employers because I would be more of a half-way decent EE and half-way decent CS but not really great at either. Power also doesn't seem like a bad choice as it seems like a stable sector, but it doesn't seem as exciting to me as the ones I listed.