Pretty easy! Fave faction and how many do you own?
I started with Nomads as I liked the look of their minis. Turns out I really liked their fluff and play style too. I love their trickery. I have about 500pts worth, possibly more.
After that I wanted to try a Sectorial so I could get the hang of link team rules. I chose the Japanese Sectorial as I like their atheistic, and the aggressive play style would be a fun change of pace. Ninjas, bikes, and samurai.
Next up is possibly the brand new Tohaa. I like what I see so far, but they need more models.
So what about you guys?