Hmm...let's see.
Dotm deluxe roadbuster. Paint so thick it gets under your fingernails while transforming him.
Ok, the big one:
Transformers Prime's treatment of the character Breakdown.
Going into spoilers here, so be warned
So, if you watched Prime, you know Breakdown got suddenly killed off, right? Now, they did this because the voice actor left (I think? Feel free to correct me here) and he was replaced by Dreadwing.
Why do I say replaced?
Because Breakdown had an arc. And this arc was he had had history with The Wreckers, and a past with Bulkhead particularly. They couldn't explore this to it's completion in the show however.
So then Dreadwing is introduced, and he has a past with The Wreckers, and kind of ends up going by way of the honorable warrior, like I'd assume Breakdown WOULD have gone had they kept him around. And not only that, but Dreadwing is just a recolored Skyquake, so he was an easy character to make, kind of lending evidence to this argument.
I know Dreadwing and Breakdown shared screen time, (right before Breakdown's death in fact) but if they knew the VA was leaving, it stands to reason that Dreadwing was introduced to replace him and continue his story in a sense.
I like both Breakdown, and Dreadwing, and have no issues with either really. But it's still annoying to think about.
I could be wrong about AAALLLL of this however...But it's my own personal theory, making me my own bane of existence
Also they both have awesome toys