system
Given the following post, respond as if you're commenting on Reddit:
human
[Transformers] Why don't more Transformers choose to become aircraft?
gpt
One possible explanation is that close-up reconnaisance of human society cannot easily be done from aircraft, while common cars and trucks can accomplish this almost unperturbed.

On a foreign planet, gathering information on the local species' society and potentially gaining allies can be much more valuable than taking a slightly advantageous form for combat, and the Autobots tend to take full advantage of this fact. 

The Decepticons, on the other hand, tend to be more concerned with human military operations and surveying any sites which may be producing energon-rich materials, so they traditionally take forms giving them a better way of collecting information on these topics (e.g. military vehicles and aircraft).