It's funny, I've been musing on this quite a bit recently. While I wouldn't say all Christian stuff is terrible, there's just a lot out there in Christian media that is just quite "meh."
Case in point: Chris Tomlin. I'd reckon he's almost universally recognized in contemporary Christian music. Every church that uses contemporary music for worship has probably used one of his songs. Now, while I think some of his songs ("How Great Is Our God," "Your Grace Is Enough," "Our God" to name a few) are excellent, for the most part... you know, they're really not all that interesting to me. I grew up around rock, so I guess I've developed a taste for fast tempos and electric guitars. Chris Tomlin doesn't give much of that. But you know who does? Flyleaf. Flyleaf is a Christian band, believe it or not ("All Around Me" could easily be treated as a worship song and "So I Thought" ends with "In all these twisted thoughts I see, Jesus there in between") and they know how to rock. Switchfoot and Skillet aren't bad either.
My issue with Christian movies is that they're so emotional and sentimental. "Courageous" talks about fatherhood. "To Save a Life" screams of teen drama. It's very heartfelt stuff - and I don't have a problem with that - but it just doesn't appeal to me.
I feel like there's a gap in Christian contemporary media today. Maybe the Nicholas Cage reboot of "Left Behind" will fill it. The gap is that it doesn't really speak to the common person, Christian or otherwise. I've seen a lot of emphasis on trying to reach people who are addicts, suicidal, depressed, from broken homes, etc. But not everyone is having those issues. I'm not being eat up by any particular problem. But I'm also not someone who loves to have "heartfelt, intimate" worship with God. That seems to cast me in a minority group.
Why is there no push for Christian electronica/techno/dupstep/etc. music? That's becoming popular, but nobody seems willing or able to step up. Can anyone find a Christian band that has the skill of Red Hot Chili Peppers? Where are the Christian sci-fi programs? I dream of the day there is a Christian show akin to Star Trek or Doctor Who. But until these things come about, Christian media probably won't entertain me and others - hence we will gravitate toward secular media, which might put us at risk of taking pleasure from sinful things. At the same time, non-Christians may look and see what our media is like, and think that being Christian is very, very boring.