What kinda of critical care experience?

I am a currently a nursing student, 6 months untill graduation! I know I've got some years of resume building in order to fly, so my question is this. What kind of critical care do you recomend? Trauma/surgical ICU, CCU, Medical ICU??? What are your suggestions? What are your critiques?

I am currently a tech in an Open Heart Recovery unit. I have the potential to transition in as an RN when i graduate. The unit has patients that are extremely acute, with multiple IV drips, Swans, vents, ect... Would this be a good place to start out, when it comes to getting experience for flight nursing? Or is it too cardiac specific, lacking the full systems interactions?

Thanks for any input.