"Who goes first?" Now there's a question. My experience to date:
In the UK, Netherlands, Denmark, Norway, Italy, Finland, Sweden, most of Germany, most of France a first come, first served approach (or departure) is followed subject to a bit of shuffling for slots, improved departures sequences or plain common sense.
But, I have fond memories of waiting for Brussels Airlines at BRU (many times), Luxair at LUX (lost count), German Wings at CGN (one morning in particular), being squeezed out at NIC for an AF, moved aside for an Iberian descent in BCN, made to give way to a Nikki or two at VIE (yesterday) and so on. Some of these were so blatant as to beggar belief and some were very subtle, but local favouritism still rules OK in many places.
PM