Nothing wrong with LG ..If you like it ..
I had it for 2 year as a company phone .. Did not like it a bit .. !
BTW .. my S9+ gets little warm when fast charging.. No problem at all .
I had an LG G6.. its a good phone, not great.. But the front facing camera sucks! it made me jump to the s9+ this year.. so far its been a great phone. Im even into the samsung launcher that everybody hates. LG stock launcher it was way worse.
I had the G6 and I felt like the screen wasn't as good as the S9. I will say, autofocus on the front facing camera on the G6 was better than the S9. Battery life is definitely improved on the S9.
I have a V30 and my wife a a S9+. One thing that I have noticed, and will probably give up my V30 for a S9+ is the S9+ blows the V30 away in signal strength. Both phones same network, same spot and the S9 gets up to 10 dbm in strength better than the V30. Also notice the S9 will grab other bands that the V30 doesn't.