Great question!
As someone who grew up watching G1, but didn't have access to any of the toys on shelves (at least until the commemorative reissues came along) I definitely had a wish list in mind.
In all honesty you could've given me anything G1 and I would've loved it, but these are the characters I recall obsessing over the most.
Powermaster Prime (yes specifically him because of the super robot mode)
Bumblebee
Jazz
Ironhide
Swoop
Springer
Ultra Magnus
Starscream
Devastator
Astrotrain
Looking to buy lucky draw Armada Prime and Diaclone Marlboor Wheeljack.