I'm not really sure. I don't consider myself part of the American Democrat/Republican partisan line (However, moving away from partisan issues and into ideological issues, I am certainly a "Leftist"). I call out Republicans and Democrats for hackery, and I really feel no strong sympathies to either major political party. Some people call me "incredibly liberal" but I really hate that term and I do not like the modern Democratic party, and those people tend to balk as soon as I start talking about what's wrong with the DNC or why specific elements of identity politics are problematic. It is true however that my political activism tends to exist within or alongside the Democratic party, given that the Republican party has moved towards the extreme Right-wing groups (Religious Right, Alt-Right, and Koch/Corporatist/neoliberal conservatives.)
Along partisan lines, I guess like you I don't care very much about guns. I think there should be a universal background check, but that's about it. Again, I'm very critical of Democratic politicians for being cozy with corporate interests (Mind you, Republicans are far worse, but with the exception of Trump, they don't really pretend to be for the average American), I'm critical of their third-way/neoliberal worldview, and I'm critical of their authoritarian structures (All major positions, from presidential nominee to DNC chairperson to congressional leadership to state party chairs) are anti-democratic --institutionally designed to keep everyday Americans hands off of the till.
There's also lots of hippie woo-woo crap that I don't go in for, like New Agers, alternative medicine, anti-vaxxers, etc. All of those are just Left-wing "alternative facts" (although not all hippies are Left-wingers, some are Right-libertarians). I haven't read much saying GMO's are bad, although I believe that food should be more rigorously tested and more often as genetics change. So while it's not an a priori invalid concern, I don't think the panic over GMO's and GMO labeling makes much sense when weighed against the available scientific evidence.