I have no idea what "Luby's" is, but sometimes I crave a Big Mac and there ain't nothin' that's gonna fix that but a damn Big Mac.
I rarely eat fast food, but when I want it, I ****ing want it and I go get it.
That said, I crave 'healthy' meals as well. Basically, I eat whatever the hell I decide sounds good that day. LOL Sometimes it's SPAM and eggs. Sometimes it's smoked turkey on a bagel. Sometimes it's Ramen. Sometimes it's chinese takeout. Sometimes Thai takeout. Sometimes Mickey D's. Sometimes cubed steak with steamed veges.
I don't really consider the "value" of the food I'm eating. I consider the following: "What do I feel like eating right *now*?"