My children listen to what I listen too. I tried to have them listen to small children music, but they don't like it. I tried to have my daughter watch Baby Einsteins-- she was bored and much more preferred America's Next Top Model. My 4 year old has ALWAYS wanted something with a beat, even when she was a newborn. Her favorite song when she was a year old-- Ramalama by Rosian Murphy. She also likes Kanye West and Mumford and Sons. I mostly listen to pop, country, and some hip hop, but no rap, mostly what you can dance and sing to (we LOVE Glee) and I don't listen to the songs with profanity (for the most part), but she does know the words to Katy Perry, Taylor Swift and Lady Gaga. She doesn't like normal lullabies, she says they're boring. She likes Cat Stevens and The Beatles and Michael Jackson and Garth Brooks. DH sings her patriotic songs as lullabies (America the Beautiful, etc).
I agree that music/movies don't shape a person and there are somethings I put my foot down with, ie gore and sex, but there is as much fighting in some Disney movies as there are on NCIS-- um, the voodoo guy on Princess and a Frog freaked me out! My husband is also a Marine, so profanity, guns, death and war were never going to be kept out of her life, and we've explained to her what Daddy does for a living and she knows not to say the "grown up" words.
That being said, she also likes Disney and Dinosaur Train and ballet classes and she is a sweet caring little girl (diva) who gives her 2yr old brother kisses because she loves him. I think that the problems of music/movie exposure come when the parents are not there or unaware or unwilling to explain what they are hearing/seeing to their children. In the end it all comes back to the parents, and if some parents don't want their children to listen to Pink or Bruno Mars, then that is there decision and I absolutely respect that, but if you are going to let your child watch R rated movies and dirty rap music, you had better be there when your child has questions.