Well, I guess mine is kinda odd consdiering the character involved.
I grew up in Pakistan. Transformers did not show on TV. I stumbled onto the show by accident when renting videos and was hooked. Unfortunately, the exchange rate was not conducive to kids there owning US made toys. That is if you were lucky enough to find one.
My first Transformer ever was Mixmaster, 400 paki bucks! Considering that people earn the same amount there as here, numerically, it would be like a $400 Transformer here. Crazyness. Anyway, so we were kinda limited to realy special presents, and the very basic cheap toys. i.e. Combiners.
That is, until the summer of 1989. My parents decided to go visit my grandparents in Angola, Indiana after 5 years of not haviong been here. Now the exchange rate made shopping here a little prohibitive, as one US dollar was like 40 paki ruppees. However, I got to buy a bunch of minis, a couple of mini stations, some combiners. You know, the cheaper stuff.
And then, before we left, I saw my first Prime toy ever! Powermaster Optimus. Dudes, I freakin begged. BEGGED!!!!
However, $30 I think it was, was more than my mom was willing to spend. So, I begged on the ride home, I begged at home, I prayed everyday, well, begged some more.
Then the day we were leaving to return, on the way to the airport, we stopped at Toys R Us and....woohoo!
Must have been my fave toy ever. My moms still talks about it. I was the only kid I knew of with a Prime of any variety and everyone was green with envy. Prime, a base, huge prime, all in one. Good stuff.
Well, unfortunately, I only had hime for like 6 months-a year. A kid in class borrowed it and freakin changed schools b4 returning it. All I got in return was a couple of freakin combiners.
Well, another Powermaster Prime is in the mail to me right now, finally almost 2 decades later thanks to the trading forum here.

He is headless but I'm sure ebay will remedy that.
Now to get a Resissue MISB and I can lay that old ghost to rest. Powermaster Prime is soon to be sitting on my medside table again......where he belongs.
P.S. Yes, I know, not one of the most impressive primes ever, but, for a id in Pakistan who had a Megatron cut from paper and colored with crayons, it was the best toy EVER!
P.P.S. I think I'll buy my moms one for xmas. Return the favor ya know/