The OP said in a nutshell, so my earlier post summed up what I typically "look for". Honestly speaking, I still do ground shifts when I have a chance, and more often than not no one has a clue who I am since I am technically a part-time field/ ground paramedic; most faces are as new to me as I am to them.
I base most of my shifts off hours that best suit my personal life on my days off. What I look for is really someone who knows how to navigate fairly well around town without a whole lot of guidance, and can get from anywhere in our response areas to our chosen ED.
As far as walking through my expectations with my EMT's, I say no. I don't know how many times over the years I have tried that only to find it all but fell on deaf ears when it was crunch time; just follow my lead on calls, nothing more, nothing less.
I stopped trying to "impart medic wisdom" on most EMT's because no matter how interested they seemed initially, it never really felt genuine. I have had a multitude of partners drive like a-holes; yeeeah, don't do that, that will end up with a very angry monkey, especially if he's having to swing from OSB to OSB; not a good shift.
Be reasonable, have common sense, show some initiative, but ask if you're uncertain. Don't try too hard, just do you and play it by ear. Every medic, EMT, man, woman, etc. is different and has a slew of different expectations.
If you can properly place 12 leads you get bonus points. I respect the back of the rig (my office) and will keep it clean/ pick up after myself on 98% of the calls because A) we're a team, and B) it isn't your job to pick up after me unless I am super inundated. I do expect you do the same to your side of the front cab.
Leave the on-coming crew with enough fuel to get through at least 1/2 the shift, preferably a full tank. Replace any O2 bottles (I have no problem helping here either) if they need it before or after shifts (especially the house), leave it nice and clean, and if you clean the floor of the unit on most/ all calls you are very much appreciated by me.
I'm sure there's more, but for now these are my top things. Take pride in your job as I do mine. People act weird around the flight paramedics here sometimes, so if they ask where I normally work I either tell them I am a CCT paramedic, or work at the airport. I'm not trying to impart any braggadocio upon the doe-eyed EMT's
, that's just lame, IMO.