Who would be the big spoon?

Steve for the same reason that has been mentioned several times

Who would wake up first?

See above

Do they have nicknames for each other?

I’m going with no 

What happened when they met each other’s parents?

I doubt it would happen are Coulson’s parents even alive?

How do they apologise after an argument?

ummmmmmm probably both sincerely Coulson seems like a good apologizer person

What would they be like as parents?

I seriously doubt they would ever have kids together

What sort of gifts do they get for each other?

Steve would probably get nifty old fashioned things like the stuff Coulson collects so he can add it and I do not know what Coulson would get Steve.

Who gets jealous easiest?

I figure Coulson would bc in this scenario he knows how desirable Steve is bc for a long time he was on a similar level to like the general masses of Captain America fans? If that makes sense? Plus he’s physically older and like Steve is studly so he’d probably be worried about that or maybe not who knows

Who is the most adventurous?

I think Coulson but maybe not.

Who is the most protective?

Steve bc Coulson already died once jeez

What would they have been like as childhood sweethearts?

I doubt it would’ve happened bc in my head Capsicoul always strikes me as hero worshippy (I’m not saying it’s the only way to see it and no offense to he shippers it’s just how I see it) so he wouldn’t really be interested in Steve before he was Captain America probably

Do I ship it?

NOTP / Crack only / AU only / Not really / Maybe a little / Well now I do/ Yes/ Of course! / OTP