As Goliath pointed out, a great way to improve BeerRiot's recommendations is to vote on more than just the beers it thinks you'll like. In fact, if you're up for it, you may want to try those it thinks you won't like, or even those it has no strong feelings about.
To help facilitate this kind of voting, I've just made it easier to find what's at the bottom, and the middle of your recommendations list. On the Recommended page, you'll still find your top recommendations, but you'll also see buttons for the middle rank, and the lowest rank.
If you really want to look even farther afield, check out the later pages of the beers list, sorted by score, where you'll find things that BeerRiot can't even guess at for you.