soundsthat little buzzy mechanical sound when you turn your turrets
that windy gushy swoosh sound when a gliding aircraft near misses you (fuel or engine failure)
the sound of the wheels turning on your 5 incher
your tank crew, bomber crew, or gun crew communicating throughout your vehicle (in different languages)
The ability to hear if another aircraft had a rough landing (crash land or skiding)
Killsjust having them blow up has become annoying to me. i want more stuff like
http://www.youtube.com/watch?v=Pe36UMRkRbk&feature=relatedeven after you kill the pilot, You slow death but violent decent thing
And the inability to bail out of and aircraft pulling more than 5Gs