I know that exists those beers that uses fruits and then leaving beer with sugary taste, for example Belgian Hoergaaden with orange zest. But there are those without any fruit part and it's yet sweet.

I don't like too much these kind of beer but I don't know what look for in orther to avoid them.

What kind of ingredients should I look for? Or maybe, should I look for ingredients that leave beer less sweet? 

P.S. My favorite kind of beer are American Lager like Heineken, IPA and Stout from Ale family.