He's one of the "good guys", but he constantly steals and usually doesn't care about others. That's why he's awesome. Most of his get rich quick schemes usually help the plot, like when he adopted like, 12 orphans, or when he ran a dating match service. So we got a character who is generally liked by the audience, helps carry the plot, and is one of the most funny characters. That's a win.
Speaking of Bender Bending Rodriguez, I've heard people say he reflects a negative stereotype of hispanics. Sure, he does steal, drink, and is usually lazy, but is anyone offended by Bender's antics? I mean, he's a freaking robot, not a race. Just wondering.