My G1 1984-86 collection is only complete in terms of cartoon characters.
My main priority from this era would be the Deluxe Insecticons. Second priority from that would be the Mini-Spies. I'd like to get Time Warrior but I doubt I'd ever find it for a price that I'd be willing to pay (so I'll have to work on convincing griffin to give me his <jedi.mind.trick>).

Other stuff from that era that I don't have but are low priority for me would be:
+ Mini-Spies
+ My First Transformer (car)

...and there's some other stuff from that era that I don't really care about, like Latin-American Transformers, Tyco cars etc. Meh.

My current holy grail is finding an Animated Blitzwing that doesn't have either a busted wing-peg or brittle canopy tabs. I'm on my fourth Animated Blitzwing toy so far after refunding/exchange 3 previous ones because of those defects.