Thank you all for your kind words and ideas.
@sens1992, Actually for me i dont like sets which are not finished, e.g buildings with a back opening or in the airport's case,only the front entrance and counter, with the minifigs walking into nothingness. So decided to give a go at MOCing and this was what it became...
@KyleJohnson11, The cargo terminal is a great idea I never thought off! Thanks! will think off something to start off.
@lightningtiger, i wanted to use the 2006 airport conveyor belt but was due space issues. It would only leave a walk space of 2 studs which is too squeezy.
Definitely will showcase more when i get the runway plates (or maybe road plates in the end due to the high prices of runway plates) and with photos of a more populated airport.