I recently started using Smoke and he's officially become my main character.
For what it's worth, Smoke used to be my main character back in the Sega days. Back then he was a robot but there was a code thingy you could do to unlock ninja smoke.
Mortal Kombat lore has evolved over the years but they've managed to keep the same crop of characters and then subtly brought in new faces like Kenshi into the fold.
Using Smoke as my main really takes me back to the good old days. I'm talking about the late 90s/early 20s when Mortal Kombat was the only thing that gave me life.
So, right now, I'm comfortable using almost all the ninjas, with Cyrax and Sector the only two left to learn.
Back in the day, Reptile and Rain were portrayed as ninjas but all that has changed with a bit more evolution to their characters. Rain is more of a sorcerer while Reptile transforms into a Lizard.
Anyway, in this above video is a skirmish between me and a Liu Kang user who wanted to win me by all means. He won a few battles but ultimately, it is safe to say I won the war.