From the mind of an aspiring 13-year-old:
The favourite add-on which I have reviewed is the
KIAH George W Bush Houston International Airport
I reviewed this airport when it was first uploaded using my old account
(I forgot my ID and password)
I think that this is the best airport add-on available for this awesome simulator.
This is because it has great graphic quality and hi-res textures.
In addition to this, it also has all gates fitted with Marginal's amazing Autogate!
~Just my point of view~