I've been thinking about it, and I've realized that having a second faction for every game I play is important to me. My Tau have sat on the shelf, largely, almost for as long as I've owned them. If they were the only Warhammer 40k faction I played, I would be incredibly disappointed. Luckily, though, I have my Blood Angels and my Blood Ravens (codex marines), so I always have something to play.
In Fantasy, though, I only have my Lizardmen. I'm beginning to wonder if that was a mistake.
So, what do you recommend as a faction that compliments Lizardmen in terms of giving me a variety of Warhammer Fantasy experiences?