Warning: Just because they look kid-friendly, don't ruin family time
"Cowboy BeBop" (1998-2002)
Where to Find It: Hulu
Why It's Good: Sure, it's about a guy traveling through space hunting criminals in 2071, but it's more sophisticated than you'd think. A jazzy score, a brooding protagonist, manga animation -- it's the "Blade Runner" of cartoons.
Why It's Just for Grown-Ups: Because it's too cool for kids.
Why You Should Watch Even If People Make Fun Of You: That's not cool, man.