Not a gamer* but as an open source participant IRC is the main chat room technology my distro uses. All of the conversations are easily archivable and searchable due to the pure text format. Main devs can use tools like quassel to make sure they never miss an @.
*multiplayer gamer. I do play single player games.
Typically I don’t use a DE. I’ll go for dmenu + dwm usually if I only want a WM. I find the default bindings and behaviour for the tiling is the most ergonomic when comparing it to other WMs like i3.
When I do have to get a DE setup then I’ll use XFCE because I like how it stays out of the way and I find it easy to customise.