Why can I never find jets in the BF4 spawn areas? Do you have to be a certain rank? Also some users seem to be able to consistently respawn inside of helicopters? Is this another perk?

At first, do you play on a lot of big maps with vehicles (like large conquest maps?). You could check out to start on a Silkroad map and check if you are able to see the jets and helicopter the first time you spawn with all other team members. Air vehicles are very popular though.

Cheers

Basti