I got the blue Mujjo leather case and I love it. It's thin enough to not add bulk but still adds protection. The only thing I didn't love when I got it was how the leather is wrinkled/wrapped around the top corners, but I got used to it.
The cases I've gotten from good brands that I spent $25+ on are this one, the Caudabe Sheath, and the Spigen Ultra Hybrid. The Sheath is great, but was just very plain looking for me. I liked how the Spigen Ultra Hybrid looked and the clickiness of the buttons was fantastic, but it added a little too much bulk which got annoying.
I've gotten a good handful of "Apple" silicone ones from Amazon and AliExpress, which are more than fine for the price I paid for them. Some are better than others....the mold lines on a couple are pretty bad, but the texture feels really great and smooth. Another one I got was a great blue/green color and didn't really have mold lines, but the texture after a couple weeks got REALLY rubbery which was annoying.