My experience of the Windows Store is of the fake knock-offs and similarly named apps that pop up as results in my start menu when I press "Start" and start typing the name of something I already have installed. They always seem to pop up for a couple of seconds before the actual application I'm searching for shows up. As a result I've come to the conclusion that I can't trust anything in the store itself and have never used it.
You can disable those search results. I'm not on a Windows 10 computer right now so I can't tell you where to look, but I found the settings fairly easily once it gave up trying to search the internet for a "settings" program. Do that and the search function will suck a lot less.
I've been using Windows 10 since it came out too. I tend to have everything on default settings and deliberately allowed Windows and Cortana to do pretty much everything automatically, i even have one on my computers on the fast ring...
I have downloaded Netflix, Audible, tubecast and a whole bunch of other apps from the store
I've poked around in there. Think of live tiles as the latest version of desktop gadgets. I installed the weather channel free app, I now see local weather when I hit start.
The MSN Weather app is preinstalled with Windows 10, and has the same basic capabilities. And since you don't need to install it, doesn't require you sign into a Microsoft account. (I actually like setting up this app on enterprise users' start menu, it's a nice extra. And they don't have Microsoft accounts connected.)
The built-in weather app and tile is solid enough that I find people downloading a third party one kinda surprising.
I think I saw it on a list of windows 10 apps to get somewhere. Clicking on it gets you a radar map. Really it was half weather, half trying out the windows store experience.