Florida resident here. I carry a fixed blade virtually 100% of the time I'm not at the office unless I'm not wearing a belt, then it's a folder in my sweatpants/shorts pocket.
In Florida, it's legal to open carry a fixed blade, but of course, I am completely understanding how out of place that looks in a suburban/urban setting, so my carry fixed blades of choice tend to be 3 to 3 and a half inches, and I carry them horizontally in a crossdraw sheath on my left front side on my belt. I've got one or two four inch blades I carry as well. As a result of all this, I tend to consider any fixed blade purchases based primarily on the sheath system they come with, as I've mentioned it before, but I hate, I HATE having to buy an aftermarket sheath for a knife, so I tend to not buy that knife in the first place and save myself the trouble. I like Kydex, with the ability to use a Tek-Lok or the Spyderclip. I don't like vertical blade carry, and so if a knife only has that as an option (such as in most of the fixed blades made by production guys, as well as most of our custom makers on the Knifemakers Exchange), it's a pass for me. Sorry, not sorry.
A couple of things about carrying horizontally. One, most people generally will not look along a man's beltline unless an obvious gun/bag/bulky object is clearly visible. All my knives tend to have kydex sheaths, and as such are slim in form factor (no bulky leather sheathes for me, thanks). So, I've never once had anyone make any comments about my knives. Secondly, my shirts tend to cover the knife completely, as I generally don't tuck my shirts in unless I'm at work or a formal function, at which point I'm usually carrying knives* in other ways. Now, I DO have my conceal carry license here, which covers any possible situation where an LEO might see my knife, and deem me a person of interest, so that's never bothered me.
However, it also helps that I have completely normalized carrying a fixed blade with me so my body language no longer says "I'm carrying something that I know I shouldn't be". Ever seen someone conceal carrying a firearm for the first time? Their body language is a dead giveaway. They tend to keep their hand close to the holster, and I've even seen people unconsciously grab it, or touch it to be sure it's still there. Other times, I've seen people pat their firearm, and then adjust the clothes covering it, because they're clearly nervous about printing. There are other factors, but those are a couple of the most obvious. Nowadays, my knife goes on when my belt goes on, and all is good to go. It's not in anyone's face, yet I'm still carrying a serious tool that can be used for anything from cutting a steak at a restaurant if the provided cutlery's not up to the task, to...well, you know.
* Of course I meant knives, plural, come on now. Carry just one knife? What?