My first dragon wouldn't eat crickets at all. After 3 weeks of trying everything, he loved roaches. I got a new baby last week who wasn't eating much unless coaxed, I figured relocation stress. Tonight I thought I'd try a few roaches.... she ate about ten. I don't know if they can see them better, that they run fast and they like to hunt/chase them, or they just like them that much more. I think they like them more to be honest. I look at insects like this for my dragons.
Meal Worms - hot dogs (not good for you but still eat them on occasion)
Crickets - hamburgers (not bad if you only have them once in a while but can't eat every day)
Phoenix Worms - chicken (pretty good and good for you and can eat quite often)
Silk Worms - pork tenderloin (good, could eat more often but expensive)
Roaches - steak (will eat pretty much anytime its put in front of you)
Greens - salad (should eat every day at least once and more when you get older)