Best Altcoin to Invest In?

Hi Guys,

so I've been playing around with cryptocurrency for a while now, mostly Bitcoin but a few Altcoins as well (Litecoin, Darkcoin/Dash, and Steem of course...)

People here seem extremely knowledgeable, and I was wondering what Altcoins are people here investing in? What Altcoins would you guys recommend?

(And don't worry, I'm already sold on Steem, no need to convince me!)