I hope that In-N-Out continues to spread out. I honestly feel so spoiled that there are two locations just a few miles away from me.
Would need to try more Five Guys to really compare and contrast the two, but right off the bat, In-N-Out is so much better than the typical fast-food chains.
Sometimes I like to order my burger protein style, which substitutes the bun for a fresh lettuce wrap. It's a bit healthier, yes, but the hot and cool textures are yummy, too.
You can order a Neapolitan version of the shake which is the three flavors mixed together, just like the ice cream flavor. Not for everyone, but I'm into it.