JudasIscariot: Well, the default setup has all these fancy effects turned on by default that when I play games and accidentally go to the upper left corner of the screen it does this weird mode where it shows all the windows at once and then resets my display to a very low resolution. I fixed that issue by turning off all the special effects.
Yeah, that was an initial nuisance for me too. It's one of the first things I disable on a fresh install: System Settings --> Workspace Behavior --> Screen Edges --> Make sure all are set to "No action".
I also disable certain effects that make KDE feel very slow (e.g. sliding popups, slide, fade) and set "Suspend desktop effects for fullscreen windows", amongst other tweaks.
JudasIscariot: Then later on, my desktop in KDE got screwed up where it looks like it got moved beyond my display range but my games play just fine. I have no idea how to describe this, it's something you would have to see with your own eyes.
Interesting... did this happen right after something changed the system display resolution?
I've had an issue once before when something changed my system display resolution and then didn't switch it back after (something I was testing in Wine set a low resolution before crashing), so my desktop was at 1920x1200 while the display resolution was still something much lower & I was able to pan over the desktop with the mouse.
Testing in a VM just now with Mint Cinnamon edition this kind of issue with display resolution not resetting under certain circumstances doesn't seem to be KDE-specific though.
JudasIscariot: Later on, I had weird WINE issues where the WINE window would act all kinds of screwy and would, for example, capture whatever was beneath it instead of actually working properly. I managed to fix this by playing around with the Winetricks script.
I haven't experienced anything like this, although I mostly use CrossOver which has some differences to regular Wine.
JudasIscariot: Also, even with all the bells and whistles in KDE turned off it still is a memory hog as opening Gwenview would take forever and a day, opening Update Manager would take forever and a day, opening the Software Manager or God help you the Driver Manager would take an eternity.
I've never experienced anything like this on any of my systems (well the Software Manager & Driver Manager always take a few seconds but never an annoyingly long time, the Update Manager is always instant). I don't often use Gwenview as I normally use IrfanView (via CrossOver) but it also loads almost instantly here.
Checking just now in two identically configured VMs with fresh installs of the KDE & Cinnamon editions (with the virtual drives both being on HDD & without any tweaks applied) I get the same results & the Software Manager/Driver Manager/Update Manager all take about the same time irrespective of DE. Also, both KDE and Cinnamon have similar boot times & the memory use by KDE isn't that much more than Cinnamon.
JudasIscariot: Keep in mind that I was using only the official Nvidia drivers and nothing open source as far as my display options are concerned.
I think it might be me but I have no idea as to just WHAT I am doing wrong when it comes to KDE but I have issues with it every time.
I'm yet to encounter any issues so serious as to put me off using KDE... it's probably something about your system that KDE has issues with. Good thing there's plenty of choice :)
My main system is an i7-2600k @ 4.4GHz (mobo is an Asus P8P67 Pro rev. B3), 16GB RAM, GTX 970. Mint is installed to an SSD with home, tmp and var mounted to a HDD, I have no swap space and I'm using the proprietary Nvidia drivers from the xorg-edgers PPA.