I'm... not impressed... with the state of modern music coming out of the US. I can appreciate the odd pop song or electronic/house/whatever song, but on the whole, not great. That's why I prefer mostly European and a bit of Japanese music, as well as a handful of Youtube personalities (Erock, Brentalfloss).
American comedy is hit-and-miss for me. A handful of shows are genuinely funny and smart, but, as you would expect, most are... dumb. British comedy is just as hit-and-miss, though, and I really don't know any others besides.
Cartoons... oh boy. REALLY hit-and-miss, and this is a world-wide thing, I think. Through the ages, there's been the good, the bad, and the ugly. Some are hilarious, some are insultingly stupid, and some are so ass-retarded it frightens me that there are people who believe such tripe should be allowed.
Movies are largely the same as above, though I've noticed that when I see a foreign movie that I like, I tend to REALLY like it.