Besides med/surg ICU, which unit would you suggest getting experience in and why? Which did you work in and how has it helped you?

PICU- become less intimidated by youngins?
NICU- be great at IVs?
Trauma/Burn- fluid balance issues?
CVCU- do open hearts get old?
CCU- be great at cardiology?
PACU-?
ER- ?
Neuro-?