Thanks for the help, I'm just not sure if I am in fact prepared to get up at 3am night after night for years and years, so I'm trying to gather info on how difficult it is. I am a night person, I've thought, but for me that consists of staying up til 2am and sleeping til 10am. Thanks though, all this is helpful. Though I'm sure I'm being presumptuious at this point, as I haven't even got an interview or the hours yet as PIC, just doing some homework.
Certainly wouldn't be "for years" at FedEx, unless you chose that, and it wouldn't be like that anyway, as has been noted!