Yeah, I had size issues with Ken, too. He bacame some Land Of the Giants escapee who caused havoc on third earth, and also occasionally Eternia, where moss-man and skeletor formed an uneasy alliance to bring down his pituatary-defected ass. Then, after a while, I took to making lego representations of figures I couldnt afford- I recall a beautifully crafted (albeit multi-coloured) Starship Enterprise (next generation) which I couldnt bear to dismantle, even though I needed the blocks to make more of those robot guys the turtles used to fight. So, the enterprise was called into service a lot that summer, against Shredder, Skeletor, a now-evil BA Baracus (who pitied these starfleet fools) and various other bad eggs. Unfortunatley, during a routine warp flight through my house (me running with the enterprise in my outstretched hand), my mother opened the door in front of me, and the Enterprise literally disintegrated in front of me: believe me when i say no two lego blocks were still connected, and they were scattered the lenght of the house. With no backup, Castle Grayskull was overrun that day, and it took many weeks for He-man, a fireman and one of the Biker Mice from Mars to win it back…
I had my Superman model riding the Lone Ranger’s horse, Silver.
And Batman used to have Matt Mason as his sidekick. I don’t think condoms were involved, tho.
ddgryphon wins.
For me, G.I. Joe was the giant swamp creature of Dagobah. Though he didn’t really dress the part.
The space-faring Lego men (with the cool gray moon platforms) assembled the Micronauts into battle robots. The Star Wars Droid Factory also built Micronauts (and Han Solo & He-Man were the foremen).
Bit of a tangent:
I used to have one of those little green army men that I’d modified by melting the plastic and attaching parts of other figures onto him. He had a Nazi officer’s hand with a luger coming out of his chest, an arm with a bow and arrow coming out his back, an arm with a grenade in it, and then the figure’s two original arms, one of which had a sub machine gun. I also gave him a third leg coming out of his butt that even had half a platform to attach to his platform, making him difficult to knock over. His name was “The Sarge.”
I’d always set up 5 enemy soldiers around him in a circle and have them telling The Sarge to give up. “We’ve got you surrounded, The Sarge!” Inevitably though, The Sarge would fire all of his weapons with his 5 arms at once and take down the bad guys in a heartbeat!
I had a whole Johnny West set up , including a cartboard log house , barn and corral… But GOD !! Jane West was butt-ugly ! So Barbie was Johnny’s wife/girlfriend , since they were the same scale; I had Thunderbot horses in just about every colot and pose, my 2 favorites were the cantering palomino that was called Flame, but I renamed her Gypsy, and the bay with the movable head and neck I called Ranger. Damn, I loved those horses ! My Skipper doll had the Best of the West pony Pancho. I also had a bunch of plastic toy dogs that were in scale-Barbie always owned a kennel 
.
But there were no condoms involved. 
Ah, bathtub water-rescues were the best! Could sit there til the water got ice cold and still have fun. 
And when you know mom is coming to check on you, it’s always fun to hold your breath and remain motionless under the water. Ah, memories…