Cultural Signifiers

[100% pro-life no matter what]

I think listening it certain kinds of music is a dead giveaway. For an obvious example, Sleater-Kinney’s fans are almost always left-leaning due to their politics and Carrie’s preferences towards women. The fact they are from the Pacific Northwest doubles down on this. Their fans tend to also be people who like other female indie musicians, middle to upper class, white, female, and often LGBTQ. Sleater-Kinney is also pro choice as well and supports black lives matter.   

Literally who the hell is Sleater-Kinney

Seriously?

I checked the name on Google after writing that, but I literally have never heard "Sleater-Kinney" anywhere else in my life.

(by the way, I am not sure musical acts are necessarily cultural signifiers, for example plenty of left-leaning people listen to Kanye)

I was kind of joking about Sleater-Kinney. They’re not exactly a household name but neither are they particularly obscure, but I understand that someone like yourself who (correct me if I’m wrong) is more into metal and prog hasn’t heard of them.

As to music, I think it can have some correlation to political views. Hip-hop suggests more liberal views, or at least more pro-Democrat, as the listener base is African-Americans and younger whites. Similarly alt rock/indie also leans left and country right. Classic rock is harder to pin down; it is most popular among white male boomers (a generally Republican group), but it does enjoy very wide and ubiqitous popularity.

Obviously it is lazy to assume someone’s political views based off of musical tastes and there are loads of exceptions, but there are some implications to be made both from demographics of listeners and the general attitude/philosophy of the music.

I think your analysis is correct.

In any case I am not actually into metal, I just have a massive Metallica crush. I am more into prog rock, though.

For music, the conservative equivalent is obviously country, especially since it's not just listened to in the South anymore.

For brands, I agree with Chick-fil-A as a proxy for the group that OP stated.  Living in perhaps the epicenter of those types of voters, you would be amazed at how long the lines at Chick-fil-A get (they often back up traffic on nearby streets).  Another cultural signifier I would add on the right is college football.  There's a reason that Trump has taken such an aggressive stance in favor of college football being played.  It might not get as much attention, but college football's fanbase is basically just as conservative as NASCAR's or golf's.

https://www.businessinsider.com/politics-sports-you-like-2013-3

[100% pro-life no matter what]

For music, the conservative equivalent is obviously country, especially since it's not just listened to in the South anymore.

For brands, I agree with Chick-fil-A as a proxy for the group that OP stated.  Living in perhaps the epicenter of those types of voters, you would be amazed at how long the lines at Chick-fil-A get (they often back up traffic on nearby streets).  Another cultural signifier I would add on the right is college football.  There's a reason that Trump has taken such an aggressive stance in favor of college football being played.  It might not get as much attention, but college football's fanbase is basically just as conservative as NASCAR's or golf's.

https://www.businessinsider.com/politics-sports-you-like-2013-3

Isn't Cracker Barrel a big culinary cultural signifier for White Southerners as well?

It can be, although it's more of a generic white Southerner cultural signifier than the more specific group that the OP noted.  I'd even say that Cracker Barrel has more of a presence in the rural South than the suburban South (though we do have one near me).  There was an interesting, albeit outdated, piece on the divide between places with a Cracker Barrel and a Whole Foods.  I think there are now a lot more places with both of them though, so it's not quite as relevant.

Waffle House and Sonic are also examples, though they may just be partisan-leaning as a result of being regional.