Tilapia are great at converting any kind of organic matter into lean protein, but they also don't provide the omega-3 and other trendy benefits of eating fish.
I like tilapia as a generic protein that I can add to anything...an easy dinner I do sometimes is to stop at the grocery store salad bar on my way home, then put a frozen tilapia filet on the salad when I get home. 25 mins in a 450 oven cooks it perfectly from frozen. I rub it with a little olive oil and whatever seasoning strikes my fancy at the time.