In-N-Out is still my favorite, but there are none around me. I have to get that on TDY out to California or Texas.
I've never had Shake Shack, but if I'm ever around one, I'd like to try it out. There are some Smash Burgers about an hour or so north of me, but I haven't been up that way in a bit, so no opportunity to try them out.
I had Culver's on a trip to the midwest, and perhaps it was a bad day for them but I was unimpressed.
Freddy's Steakburgers was actually really good the one time I was able to try them out.
We have a Five Guys and Cookout in the area, Five Guys is the better burger, but I can get a double cheese w/ Cajun from Cookout and that is all the burger needs to be pretty good, and they are cheaper.