Oh yeah, Sam/Mikaela is like the rarest of rare pairings in Transformers fandom. I usually only find good characterizations of them in epic multichaptered fics. I think most of their characterization is my own made up canon where I'm like, "THEY'RE TOTALLY AWESOME AND MIKAELA KICKS ASS ALL THE TIME."

*sigh* I need to write Transformers fic sometime. Especially the Obama and Optimus Prime meeting for the first time plot bunny I had...