Things I like on planes:
Sleekness
Agility
Livery
Armament
Insignias
Accuracy (if that's a replica)

Thx @Ian1231100

Thx @Tully2001

I like
-Gemista on planes as well lol
-30mm flying guns that proves pigs can fly (A10)
-Howitzers hanging out the left hand side
-Red stars

Thing I like on planes:
(depends on the kind of plane)
-bulkiness/ruggedness
-heavy armament suitable for the purpose (combat aircraft)
-livery/insignia
-details
-functionality

Things I love on planes
-Balkenkreuz's (How to pluralize it?)
-MK 108 30mm Cannons
-HE S 011 jet engines

Things I love on planes
-Super low stall speeds
-Ruggedness
-Bush-flyingism