And don’t tell me you have a Galaxy S40 
I recently switched from an iPhone 7 to a Xiaomi Mi 9 Lite.
So far, very satisfied.
I use a Mi 9T and I’m extremely satisfied.
I’ve always bought high-end devices and was surprised by the 9T’s performance. Even though it’s a mid-range phone, it still easily outperforms my previous high-end device, the Mi Mix 2.
S9+ since December 2018. So far so good! 
I use a Samsung Galaxy J7 Neo. It’s not very good, but it’s serving me well.
I’ve had a Xiaomi Redmi Note 4X for almost 3 years, and so far I haven’t had any problems with it.
Google Pixel 3.
Pretty satisfied! The only downside is that sometimes the little guy heats up quite a bit 
, especially when filming something.
iPhone XR … Apple’s battery problem resolved
Pocophone F1 since December 2018.
Very satisfied, and even with customs fees from the Post Office, it was still a great deal financially.
Previous phones: Redmi Note 3 < Moto X 1st gen < Samsung S2 < Samsung Galaxy Ace 2
I’ve been using a Galaxy S9 since 2018, I’m very satisfied, and I still don’t see an advantage in upgrading.
Galaxy Note 10 +
Yes, I’m satisfied.
Moto G7 Play
So far, so good
I’ve had an iPhone SE since 2017, bought with the imminent end of Windows Phone in mind. Even though it heats up quite a bit with slightly more demanding tasks (which is very noticeable due to the aluminum back), it serves me very well for everyday tasks, running everything I need smoothly.
I use a Mi 9. My only complaint is the weak battery, other than that it serves me really well. I don’t use all the phone’s firepower, I could have gone lower
I currently have a Samsung S9, I bought it at launch, even though I paid more because it was new, I don’t regret it one bit. I always had a prejudice against Samsung, because I always thought it would lag a lot and have several pre-installed apps, but since the S6 things started to change and with the S7 it already started to become a fabulous phone in my opinion. I don’t regret it and until the time comes to actually change my phone, I might get another one from the line.
I’ve been using Xiaomi for a long time, I used to have a Mi Note 4x and now I’m using a Mi 9T Pro with 128GB, always satisfied, MIUI has always been very good.
Moto G6 Plus 4/64GB, it’s a very complete device for the 800-something I paid for it (considering the Ame cashback), since it’s one of the very few phones with NFC in this price range.
Apart from Lenovo having crippled its 4G+ and not updating it to Android 10, I have nothing to complain about the smartphone, maybe just the lack of custom Android 10 ROMs for it. There are several Android 9.0 Pie ROMs on XDA, like LineageOS and Resurrection Remix, but for me it’s not worth leaving the stock firmware for a custom one of the same Android version.
Since it has digital TV, in the future I’ll pass it on to my mom so she can finally retire her trusty Moto G5 Plus, and buy another device that’s equal or better. The problem is, as I said, finding more affordable devices (my limit is 1200) with NFC, Bluetooth 5.0, WiFi 802.11ac, and a Snapdragon 6xx.
Samsung M30 after 3 months, I’m enjoying it
Xiaomi Redmi 7A
Great value for money
iPhone 11 Pro Max, extremely satisfied with the battery and camera improvements. I think that was really all that was missing compared to the iPhone X I had.