I like Bulkhead in Animated, but the Prime version is superior.

Sky-Byte was a nice addition to G1 comics and Cyberverse.

Least favourite jump is probably Lockdown from Animated to Age of Extinction (but in between the first movieverse toy of a Lockdown was good)

Would have a big list of characters I’d like “aligned” into G1 continuity as much as I want new takes.